It is known to use lengths of flexible material for isolating selected strands of hair during a process of hair treatment such as colouring. Typically, strands of hair to be coloured are first selected by a hairdressing technique known as weaving. These strands of hair are then laid over a length of liquid impermeable material which effectively isolates the selected hair from the remaining hair. The barrier material will generally have a width of 2 or 3 inches (i. e. between 5 and 8 cm) and a length at least equal to that of the hair to be treated. One edge of the material is located adjacent the roots of the selected hair strands and in contact with the scalp. The hair roots are then pressed onto a portion of the material provided with a contact adhesive. The material is thereby retained in position on the scalp during the hair treatment process. With the material secured in place, an appropriate hair treatment substance may be applied to the selected strands of hair. The scalp and remaining hair strands are protected from exposure to the hair treatment substance by means of the barrier material.

The present invention seeks to solve certain problems with the presently known hair treatment apparatus and process. Specifically, use of the prior art apparatus can be problematic since a practitioner will often cause the adhesive on the barrier material to contact surfaces (such as the scalp, the hair ends rather than the hair roots, or the barrier material itself) by mistake. Further use of the apparatus will require remedial action in order to free the barrier material from the surface to which it has been mistakenly attached. In certain circumstances, particularly where portions of the barrier material have become attached to one another by means of the adhesive, subsequent use of the apparatus will not be possible and the apparatus will be disposed of without having been used. Even where further use of the apparatus is possible, the effectiveness of the contact adhesive will often have been reduced by its previous surface contact. The prior art apparatus can therefore lead to a time consuming and wasteful hair treatment process. In addition, the prior art apparatus do not tend to adhere effectively with greasy types of hair. As a result, it will very often be necessary to wash hair to be treated before use of the aforementioned prior art apparatus. Again, this leads to a time consuming process.

Furthermore, the adhesive will of course only secure to the barrier material those strands of hair which it contacts. Thus, where a subject with dense hair is under treatment, selected strands of hair will very often overlay further selected hair strands in contact with the adhesive and, accordingly, not themselves be secured to the barrier material. This can lead to an increased risk of hair treatment substance bleeding onto the scalp.

The problems with the prior art apparatus also include the difficulty of selecting a barrier material from a store of such materials. In the prior art, barrier materials are generally sold in cartons as tightly packed individual barrier materials. Thus, when a carton is opened, the user is presented with a plurality of barrier materials which are pressed closely together and not readily removable. During a hair treatment process, it is particularly desirable for barrier materials to be rapidly and conveniently selectable with a single hand. Since this is generally not possible with packaged barrier materials (particular with a recently opened carton of such materials), it is frequently the case that the number of barrier materials required for a particular treatment will be first removed from a carton before commencement of the treatment so that the materials can be selected with a single hand during the treatment process. However, removal of the materials from the carton can lead to the materials becoming misplaced and is not conducive to good order.

A first aspect of the present invention provides apparatus for use in the treatment of selected strands of hair, the apparatus comprising a substrate of material for separating selected strands of hair of a head of hair from other hair strands of the head of hair while the selected hair strands are treated; and securing means provided on the substrate for securing the substrate to hair strands; characterised in that said securing means comprises a plurality of elements for hooking about and gripping one or more strands of hair.

The plurality of elements may be located adjacent an edge of the substrate. The plurality of elements is preferably located across the full width of the substrate. The number of elements per unit area may also vary across the substrate. The securing means is preferably manufactured using injection moulding techniques.

It is preferable for at least one of the plurality of elements to comprise an elongate member defined by a groove in said apparatus. Ideally, said groove is straight. Opposite sides of said groove may each define an elongate member whereby said groove defines two elements for gripping one or more stands of hair. At least one of the plurality of elements preferably comprises a head having a surface sloped so as to direct hair strands pressed thereagainst towards a position relative to said at least one element whereby said hair strands are gripped by said at least one element.

It is particularly desirable for at least one of the plurality of elements to comprise a member extending outwardly from a surface at an acute angle to said surface so as to define a space between said member and said surface in which at least one strand of hair may locate in use. The junction of said member and said surface may have a closed loop shape. The closed loop shape may be substantially circular so as to define a space between said member and said surface having a substantially annular shape. The acute angle is preferably less than 45° and is preferably 30°.

At least one of the plurality of elements may comprise a member extending perpendicular from a surface. The perpendicularly extending member may have a substantially cylindrical outer surface. At least one of the plurality of elements may comprise a member extending substantially parallel to said surface. The member extending substantially parallel to said surface may have a substantially annular shape.

The plurality of elements is most preferably located on a portion of substrate surface extending part way along the length of the substrate. The plurality of elements may also be located on a curved portion of substrate surface. Preferably, the plurality of elements is provided integrally with a base portion manufactured separately from the substrate. The base portion may define a curved surface secured in abutment with the substrate. Said curved surface may be provided adjacent a leading edge of the base portion which, in use, is located against the scalp. An edge of the base portion is preferably free from the substrate so as to allow, in use, placement of a tool between the base portion and substrate. It is preferable for said free edge to be positioned so that, in use, a tool may locate in abutment with the junction between said free edge and the substrate and press an edge of the substrate against the scalp. Said free edge may be a tailing edge of the base portion opposite and parallel with the leading edge. The base portion may be secured in abutment with the substrate by means of an adhesive. Ideally, the base portion comprises means for restricting the flow of liquid across a surface of the base portion. The flow restricting means may comprise a groove in said surface of the base portion. The substrate may be of a flexible material and may also be of a transparent material.

It may also be desirable to provide a second plurality of elements on the substrate which are releasably connectable with the first plurality of elements when, in use, the substrate is folded about selected strands of hair. Said second plurality of elements may comprise fibres and/or a plurality of hooks. The fibres may be looped or have free ends.

Also, these latter plurality of hooks may be provided as recited above in respect of the elements of the securing means.

A second aspect of the present invention provides a method of using the apparatus of the first aspect, the method comprising the steps of locating the substrate of the apparatus adjacent selected strands of hair of a head of hair; and pressing strands of hair against said securing means so as to locate at least one of the plurality of elements adjacent about at least one pressed strand of hair and thereby grip said at least one hair strand and secure the substrate in a position separating the selected strands of hair from other strands of hair. The strands of hair pressed against said securing means may be strands of hair selected for masking from other strands of hair.

A third aspect of the present invention provides apparatus for use in the treatment of selected strands of hair, the apparatus comprising a substrated material for separating selected strands of hair of a head of hair from other hair strands of the head of hair while the selected hair strands are treated; and securing means provided on the substrate for securing the substrate to hair strands; characterised in that the substrate is provided with a plurality of perforations arranged in a line, wherein each end of said line is located adjacent an edge of the substrate.

Preferably, said line of perforations is located adjacent the securing means.

The line of perforations may extend across the width of the substrate from one longitudinally extending edge to an opposite longitudinally extending edge. The line of perforations preferably defines a common boundary of two portions of the substrate, one portion of substrate being provided with the securing means. The other of said portions of substrate may be provided with at least one aperture.

A fourth aspect of the present invention provides apparatus for use in the treatment of selected strands of hair, the apparatus comprising a plurality of apparatus according to the third aspect, wherein the other of said substrate portions of the plurality of apparatus are connected to one another.

A fifth aspect of the present invention provides a method of using the apparatus of the third and fourth aspects, the method comprising the steps of tearing one portion of substrate from another portion of substrate along said line of perforations; locating a portion of substrate provided with securing means adjacent selected strands of hair of a head of hair; and securing said substrate portion adjacent said selected hair strands so as to separate said strands from other strands of hair.

Embodiments of the present invention will now be described with reference to the accompanying drawings, in which: Figure 1 is a schematic top view of a first embodiment of the present invention; Figure 2 is a schematic perspective view of a plurality of hooks provided in the embodiment of Figure 1; Figure 3 is a schematic side view of a hook and loop connection wherein the hook is of the type shown in Figure 2; Figure 4 is a schematic side view of a hook and hook connection wherein the hooks are of the type shown in Figure 2; Figure 5 is a schematic perspective view of a strip of hooked material provided in the embodiment of Figure 1; Figure 6 is a schematic perspective view of an alternative strip of hooked material to that provided in the embodiment of Figure 1; Figure 7 is a schematic cross-sectional side view of an upper portion of the first embodiment secured to a wicket dispenser; Figure 8 is a schematic side view of an upper portion of a second embodiment of the present invention provided with the hooked material shown in Figure 6; Figure 9 is a schematic top view of a third embodiment of the present invention; Figure 10 is a schematic top view of a fourth embodiment of the present invention; Figure 11 is a schematic top view of a fifth embodiment of the present invention; Figure 12 is a schematic top view of a sixth embodiment of the present invention; Figure 13 is a schematic top partial view of a strip of hooked material comprising circular mushroom shaped hook members; Figure 14 is a schematic partial cross-section side view of the hooked material of Figure 13 taken along line A-A of said Figure; Figure 15 is a schematic partial cross-sectional side view of a modified version of the hooked material shown in Figure 13; Figure 16 is a schematic top partial view of a strip of hooked material comprising elongate T-shaped hook members; Figure 17 is a schematic partial cross-sectional side view of the hooked material of Figure 16 taken along line B-B of said Figure; and Figure 18 is a schematic partial cross-sectional side view of a modified version of the hooked material shown in Figure 17.

A first embodiment 2 of the present invention is shown in Figure 1 of the accompanying drawings. The embodiment 2 is hair treatment apparatus comprising an elongate strip of flexible material which forms a base sheet 4 upon which a strip of hooked material 6 (described hereinafter) is mounted. The material of the base sheet 4 is impermeable to the hair treatment substances with which the apparatus 2 is to be used.

Accordingly, the base sheet 4 forms an effective barrier between said hair treatment substances and strands of hair which are intended to be isolated from said substances. As well as having an impermeable characteristic, the material of the base sheet 4 is preferably also transparent so as to permit inspection of the strands of hair selected for treatment without the need to remove the apparatus 2 from the hair. The aforementioned characteristics of the base sheet 4 may be provided with a synthetic plastics material such as CELLOPHANE (RTM).

The base sheet 4 has an elongate rectangular shape. The particular embodiment 2 shown in Figure 1 has a width W of 75mm and an overall length L of 170mm. These dimensions may however be varied to suit specific circumstances.

In particular, the length L may be increased or decreased depending upon the length of hair to be treated. As will be evident to those skilled in the art, the apparatus 2 should be at least as long as the strands of hair undergoing treatment so as to ensure isolation of this hair from the surrounding hair. It is envisaged that embodiments of the present invention will be provided with base sheets having standard lengths of 200mm, 400mm and 500mm and standard widths of 75mm and 90mm.

An upper portion 8 of the base sheet 4 is provided with two circular apertures 10 located either side of the longitudinal axis 12 of the apparatus 2. As will be described hereinafter with reference to Figure 7, the apertures 10 allow the base sheet 4 to be mounted to the wicket of a supply device. The base sheet 4 is further provided with a line of perforations 14 extending perpendicularly to the longitudinal axis 12 across the width of the base sheet 4. The perforations 14 extend through the thickness of the base sheet 4 and, in use, allow the upper portion 8 of the base sheet 4 to be readily detached from the remainder of the base sheet 4.

The strip of hooked material 6 is rectangular in shape and extends across the full width of the base sheet 4. The hooked material 6 extends approximately 15mm along the length of the base sheet 4 and is securely attached to the aforementioned remainder portion of the base sheet 4 by means of a suitable adhesive. In an alternative embodiment, the strip of hooked material 6 may be formed integrally with the base sheet 4. An upper edge 16 (which locates adjacent the scalp when in use) of the hooked material 6 is located on the remainder portion of the base sheet 4 in line with the perforations 14. In an alternative embodiment, said upper edge may locate above the line of perforations 14 so that part of the hooked material 6 overlays the upper portion 8 of the base sheet 4. However, in this alternative arrangement, the overlaying part of the hooked material 6 is not secured to the upper portion 8 by adhesive (or other means) so as to allow ready detachment of the upper portion 8 from the hooked material 6 and the remainder of the base sheet 4 during use.

The strip of hooked material 6 is formed with an inherently curved shape. The curved shape is preferably part circular. As shown in Figure 1, once the hooked material 6 is secured to the base sheet 4, the base sheet 4 (at least in the vicinity of the hooked material 6) adopts the curved profile of the hooked material 6. In use, the curvature of the upper edge 16 of the hooked material 6 ensures the base sheet 4 conforms more readily with the curvature of the scalp. To assist in ensuring conformity of the base sheet 4 with the scalp, at least the upper edge region of the hooked material 6 may be flexible (preferably resiliently flexible) so as to allow deformation of the upper edge into contact with the scalp across the full width of the base sheet 4. Indeed, the hooked material 6 may be planar (i. e. without a curved profile) provided it is flexible. As a result, the apparatus 2 may be applied more easily and is more comfortable to the person whose hair is undergoing treatment. The specific apparatus 2 shown in Figure 1 comprises a hooked material 6 having a curvature of 4.25cm radius, however other magnitudes of curvature may of course be used.

The outer curved surface 18 of the hooked material 6 grips the roots of selected strands of hair during use and is provided for this purpose with a plurality of small hooks (not shown in Figure 1). The hooks have a mushroom shape and are of the type typically used in hook and loop fabric fasteners. Other hook shapes used in hook and loop fasteners may however be provided on the curved surface 18. For example, a hook may comprise a member extending outwardly from the curved surface 18 at an acute angle to said surface so as to define a space between said member and said surface in which at least one strand of hair may locate in use. The acute angle is preferably 30°, although other angles may be used. A strand of hair to be gripped may be pressed between the member and surface in the direction of their convergence and thereby gripped by the member and surface. The hooks may have a frusto-conical shape so as to be capable of receiving and gripping one or more hair strands pressed towards the hooks from any direction along the surface of the hooked material 6.

With reference to Figure 2, it will be seen that a plurality of identical mushroom hooks 20 are uniformly distributed across the curved surface 18. However, in an alternative embodiment, the size and density of the hooks may vary across the surface 18.

For example, it may be advantageous for the density (i. e. the number per unit area) of hooks to increase or decrease along the length of the base sheet 4. The density of hooks across the width of the base sheet 4 preferably does not vary. In this way, any given strip of hooked material 6 will be better able to effectively grip a variety of selected hair strands of different types (specifically, of different densities/thicknesses). With the hook density and shape varying along the length of the base sheet 4 (over the surface 18 of the hooked material 6) rather than across the width of the base sheet 4, adequate grip for all types of hair can be provided across the full width of the base sheet 4. However, in circumstances where the selected hair strands are of a type best gripped by hooks having a density and shape of those hooks 20 located adjacent the lower edge 22 of the surface 18 opposite the upper edge 16, the density and shape of the hooks located across the width of the base sheet 4 adjacent the upper edge 16 may be ineffective at gripping the selected hair strands. If this is considered undesirable due to a requirement to maintain the upper edge 16 secured to the selected hair stands and thereby retained against the scalp, then it is preferable to arrange the plurality of hooks 20 so that hook density and/or geometry varies across the width of the base sheet 4. In this way, at least some of the selected hair strands, at certain locations along the length of the upper edge 16, will be gripped so as to retain the entire length of the upper edge 16 against the scalp. Use of the plurality of hooks 20 in gripping selected strands of hair will be described in further detail hereinafter.

As most clearly seen in Figure 5 of the accompanying drawings, the curved surface 18 of the hooked material 6 is provided with a groove 24 extending along the upper edge 16. In use, the groove 24 acts as a gutter and provides resistance to liquid hair treatment substances which may attempt to flow from the aforementioned remainder portion of the base sheet 4, towards the upper edge 16, and onto the scalp. In an alternative strip of hooked material 6'as shown in Figure 6, the groove 24 is replaced by ridge 26 which extends upwardly from the surface 18'and extends along the upper edge 16'. In use, the ridge 16'acts as a barrier to fluid attempting to flow over the edge 16'.

Although the strips of hooked material 6, 6' shown in Figures 5 and 6 are illustrated as planar elements, said strips 6, 6' are in practice formed so as to assume a curved profile (preferably having a part circular shape) when in a relaxed state. As indicated above, the curvature of the strips 6, 6' is such as the upper edges 16, 16' are curved so as to allow conformity of said edges 16, 16' with the scalp of a person undergoing treatment.

The base sheet 4 is further provided with a fold 28 extending perpendicularly to the longitudinal axis 12 across the width of the base sheet 4. The fold is located midway between the upper edge 16 and a lower edge 30 of the base sheet 4. The fold 28 may be provided at an alternative location however. It is preferable for the fold 28 to be located so that the lower edge 30 may be folded, in use, onto the upper edge 16 so as to completely encapsulate the selected strands of hair. Alternatively, the fold 28 may be omitted and provided by a user as and when required.

With reference to Figure 7, the apparatus 2 is shown mounted to the wicket 32 of a supply device 34. The wicket 32 is a U-shaped bar of circular cross-section. The wicket 32 may be manufactured from any suitable material such as a metal or a plastics material.

The two free ends 36 (only one of which is visible in Figure 7) of the wicket 32 are spaced from one another by the same distance separating the apertures 10 provided in the base sheet 4. Also, the diameter of the wicket 32 circular cross-section is substantially equal to the diameter of the apertures 10 so as to allow one free end 36 to pass through one aperture 10 and the other free end 36 to pass through the other aperture 10. The wicket 32 thereby serves as a fixing to which one or more base sheets 4 may be mounted.

Although not illustrated in Figure 7, a plurality of apparatus 2 are preferably mounted to the wicket 32. For example, twenty, thirty or forty base sheets 4 may be mounted to the wicket 32. The apparatus so mounted may be identical to one another or vary in size or design. In this latter regard, the plurality of apparatus may include apparatus having differing lengths, widths and/or differing designs of hooked material (as previously described for example).

Once the wicket 32 has been supplied with the required apparatus, the free ends 36 of the wicket 32 are received in a base member 38 of the supply device 34. The plurality of apparatus 2 are thereby prevented from sliding from the wicket 32. In practice, a plurality of apparatus 2 may be sold to a user pre-mounted to the wicket 32. The wicket 32 may then be realisably secured to a base member 38 already installed at the user's workplace. Alternatively, the plurality of apparatus 2 may be supplied with a supply device in its entirety. In these circumstances, the base member 38 of the supply device 34 may be provided with suitable fixings allowing the base member 38 to be realisably mounted to a wall in a rapid and convenient manner, for example, the rear face 40 of the base member 38 may be provided with apertures for engaging hook members mounted in a wall.

It will be understood that use of the supply device 34 allows convenient selection of a required apparatus 2. A plurality of apparatus 2 may be arranged on the wicket 32 in an ordered manner and this assists the user in grasping a particular apparatus 2 for use in isolating selected strands of hair. The user selects the required apparatus 2 by grasping the aforementioned remainder portion of base sheet 4 below the line of perforations 14.

The remainder portion of base sheet 4 is then pulled along the wicket 32 and away from the base member 38 in the direction of arrow 42 (see Figure 7). The upper portion 8 is however prevented from being removed from the wicket 32 by means of a cross-bar portion 44 (shown in dotted outline in Figure 7) of the wicket 32. Nevertheless, although the upper portion 8 is prevented from being removed, the line of perforations 14 extending across the width of the base sheet 4 allows the remainder portion of the base sheet 4 to be readily detached from the upper portion 8. Thus, the portion of an apparatus 2 required for the isolation of selected hair strands (i. e. the remainder portion of base sheet 4 provided with the strip of hooked material 6) may be readily selected for use.

Although the upper portion 8 of a selected apparatus 2 remains on the wicket 32, this does not prevent the ready selection of further apparatus 2. The upper portion 8'of a selected apparatus previously torn from the wicket 32 is shown in Figure 7.

Once the required strands of hair have been selected (typically by means of a technique known as weaving) and a required apparatus 2 torn from the wicket 32, the remainder portion of the base sheet 4 is placed under the selected hair strands with the upper edge 16 pressed against the scalp and adjacent the root ends of the selected strands.

The selected strands are then lightly pressed and massaged against the curved surface 18 of the hooked material 6. The selected strands of hair are thereby pressed between adjacent mushroom hooks 20 extending from the surface 18 and thereby tend to locate between the head of the hooks 20 and the surface 18. Hair overlaying the full width and length of the hooked material 6 is massaged (with, for example, the thumb of the user) so that the mushroom hooks 20 locate around the hair strands so as to grip said strands and ensure that the upper edge 16 is retained adjacent the scalp. The engagement of the hooks 20 with the selected hair strands also serves to resist lateral movement of the base sheet 4 during the hair treatment process.

The effectiveness of the hooks 20 in gripping selected hair strands is substantially independent of whether or not the hair strands have been recently washed. The hooks 20 tend to grip greasy hair with essentially the same effectiveness as when gripping non- greasy hair. The hooks 20 may also be disengaged from hair strands and reapplied without loss of grip effectiveness. Errors in the positioning of the upper edge 16 may therefore be readily corrected without the need for use of further apparatus 2. Ease of use is also facilitated by the hooks 20 in that said hooks 20 tend to adhere only to surfaces comprising fibres about which the hooks 20 may locate. The hooks 20 will not therefore tend to adhere to the remainder portion of the base sheet 4 or to the skin of a subject undergoing treatment.

With the upper edge 16 located in the desired position on the scalp, the selected strands of hair are laid so as to extend over the remainder portion of base sheet 4. Thus, it will be apparent that the remainder portion of the base sheet 4 functions to isolate the selected strands of hair from other hair located below the remainder portion and is effective to mask said other hair from exposure to treatment substances applied to said selected strands of hair. An appropriate hair treatment substance such as a colouring liquid may be conveniently applied to selected strands of hair by means of a brush. It will be apparent to the skilled reader that the groove 24 functions to prevent hair treatment substance flowing from the hooked material 6 onto the scalp.

Once the hair treatment substance has been applied, the selected strands of hair are covered by folding the remainder portion of base sheet 4 along the fold line 28 so that the lower edge 30 locates adjacent the upper edge 16. Alternatively, the selected hair strands may be covered with a cover sheet separate to the remainder portion of base sheet 4. The lower edge 30 may be secured to the upper edge 16 with an adhesive, however it is preferable for a portion of the base sheet 4 adjacent the lower edge 30 to be provided with a material which may be gripped by the plurality with hooks 20 provided on the curved surface 18. The material may be a fibrous material comprising a plurality of loops 46 as conventionally used in hook and loop type fasteners (see Figure 3). Alternatively, the material may comprise a further plurality of hooks 48 which are preferably of the mushroom type (see Figure 4).

When the lower edge 30 is secured adjacent the upper edge 16 (or a separate cover sheet is being located in place), the selected hair is encased and sealed from the immediate surroundings.

The present invention is not limited to the specific embodiment described above.

Alternative arrangements and suitable materials will be apparent to a reader skilled in the art. For example, the apparatus 2 may be modified by replacing the grooved strip of hooked material 6 as shown in Figure 5 with the ridged strip of hooked material 6'as shown in Figure 6. A partial side view of the resultant apparatus 2'is shown in Figure 8.

Further alternative apparatus 102,202 are shown in Figures 9 and 10 respectively. These alternative apparatus 102,202 differ from the apparatus 2 shown in Figure 1 only in that a strip of fibrous material 104 is provided on the base sheet 4 in the apparatus 102 of Figure 9 and two portions 204,206 of fibrous material are provided on the base sheet 4 of the apparatus 202 shown in Figure 10. Elements of the further apparatus 102,202 common with the apparatus 2 shown in Figure 1 are identified with like reference numerals.

As can be seen in Figure 9, the strip of fibrous material 104 is located adjacent the lower edge 30 of the base sheet 4 and extends across the full width of the base sheet 4.

When the base sheet 4 is folded along fold line 28, the fibrous strip 104 mates with the strip of hooked material 6 so as to secure the lower edge 30 adjacent the upper edge 16.

As will be seen from Figure 10, the two portions of fibrous material 204,206 of apparatus 202 are square in shape and are located adjacent the lower edge 30 and opposite longitudinally extending edges 208, 210 of the base sheet 4. Thus, when the remainder portion of the base sheet 4 is folded along fold line 28, the fibrous portions 204,206 serve to retain the lower edge 30 adjacent the upper edge 16 by engaging with the hooks 20 of the hooked material 6.

Alternative arrangements of hook and loop or hook and hook fastening will be apparent to the skilled reader. For example, hook and loop fastening material may be provided around the entire perimeter of the reminder portion of the base sheet 4 (i. e. along the length of the longitudinally extending edges of the base sheet 4 as well as the lower edge 30 of the base sheet 4). In this way, when the remainder portion of the base sheet 4 is folded along the fold line 28, selected strands of hair may be completely encapsulated and sealed between the material of the base sheet 4.

A yet further alternative arrangement is shown in Figure 11 of the accompanying drawings. The apparatus 302 of Figure 11 differs from the apparatus 2 of Figure 1 only in that a strip of fibrous material 304 is provided adjacent the lower edge 30 on the side of the base sheet 4 opposite to that on which the hooked material 6 is provided and in that the strip of hooked material 6 has a portion 306 which extends laterally of the base sheet 4. The fibrous material 304 extends across the full width of the base sheet 4. Also, the extended portion 306 of hooked material 6 has a length substantially equal to the width of the base sheet 4. In use of the apparatus 302, the base sheet 4 is folded along fold line 28 so that the lower edge 30 locates adjacent the upper edge 16. The lower edge 30 is then secured in place by folding the extended portion 306 of hooked material 6 onto the fibrous material 304. The extended portion 306 is folded at the edge of the base sheet 4 along a pre-formed fold line 308. The hooks provided on the extended portion 306 are thereby engaged with the fibrous material 304 and prevent substantial movement of the lower edge 30 from the upper edge 16. In a further variation, extended portions of hooked material 6 may extend from both longitudinally extending edges of the base sheet 4. Preferably, the two portions have lengths substantially equal to half the width of the base sheet 4.

The aforementioned fibrous material may comprise a plurality of loops for engaging hook members as is known in conventional hook and loop type fasteners. The fibrous material may also be provided as a cloth or absorbent paper material.

Alternatively, the fibrous material may be substituted with hooked material so that hook to hook connections are made rather than hook to loop connections. Hook to hook connections are particularly secure when mushroom shaped hooks are employed as shown in Figure 4 of the accompanying drawings.

Furthermore, in order to ensure a portion of substrate with hooks provides a connection of uniform strength across said portion with hair strands and/or hooks/loops of varying types, more than one hook type (i. e. hook geometry and/or density) may be uniformly distributed across said portion. Any given hook member may therefore then be located next to a hook member of a different type.

In still further variations, the function of the hook and loop or hook and hook fasteners in securing portions of base sheet together (or a separate cover portion to the base sheet) can be performed by a tongue and groove arrangement, wherein a tongue extending from one portion is received and gripped by a groove in another portion.

A sixth embodiment 400 of the present invention will now be described with reference to Figures 12 to 18 of the accompanying drawings. The sixth embodiment is similar to the previously described embodiments in that it comprises an elongate strip of flexible material which forms a base sheet 404 upon which a strip of hooked material 406 is mounted. The material of the base sheet 404 is impermeable to the hair treatment substances with which the apparatus 400 is to be used. Accordingly, the base sheet 404 forms an effective barrier between said hair treatment substances and the strands of hair which are intended to be isolated from said substances. The strip of hooked material extends across the full width of the base sheet 404 and is securely attached along an upper edge thereof by means of a suitable adhesive. The dimensions of the base sheet 404 and hooked material 406 as are earlier described in relation to the previous embodiments.

Between 2mm and 4mm of the lower edge 407 of the hooked material 406 is free and unadhererd to the base sheet 404. The purpose of this feature is to allow the tail of a comb or the finger nail of a user to locate between the hooked material 406 and the base sheet 404 in the region of the lower edge 407 so as to allow the upper edge 409 of the base sheet 404 to be pressed, in use, against the scalp. The portion of hooked material 406 adhered to the base sheet 404 is that portion of hooked material 406 located between the upper edge 409 of the base sheet 404 and dotted line 410 shown in Figure 12. It will be apparent to the skilled reader that this feature can be employed on any of the previously described embodiments.

As in the embodiment of Figure 9, a strip of fibrous or hooked material 411 is secured by means of a suitable adhesive adjacent the lower edge 413 of the base sheet 404. Thus, when the base sheet 404 is folded in use and the lower edge 413 is closed adjacent the upper edge 409, the lower strip of material 411 will engage the upper strip of material 406 and become connected therewith. This connection not only assists in retaining the base sheet 404 in a folded position, but also assists in preventing hair treatment substances from undesirably leaking onto the scalp. When a fibrous material is used in any of the embodiments described herein, the fibres of said material may be looped or, ideally, have a free end.

A partial plan view of the strip of hooked material 406 is shown in Figure 13 of the accompanying drawings. The enlarged view of Figure 13 shows that the hooked material 406 is provided with a plurality of circular mushroom shaped hook members 414. The hook members 414 are arranged in a plurality of columns which run parallel to the longitudinal axis 415 of the base sheet 404. As a result, strands of hair may locate between columns of hook members 414 without being bent or kinked. In other words, strands of hair may assume a straight form whilst lying between adjacent columns of hook members 414.

As shown in the cross-sectional side view of Figure 14, the head 416 of each hook member 414 has a flat planar upper surface 417. However, in a modified version of the hooked material 406 as shown in Figure 15, each hook member 414 has a head 416 with a conical upper surface 418. As yet a further alternative, the upper surface may be part spherical as shown in Figures 3 and 4. The use of a curved or otherwise sloping upper surface assists in locating hair strands between the hook members 414. In this regard, said upper surfaces 418 of the hook members 414 serve to guide hair strands towards the gap between the hook members 414.

The strip of hooked material 406 shown in Figures 13 to 15 may be substituted with the further modified strips of hooked material shown in Figures 16 to 18 of the accompanying drawings. The hooked material shown in Figures 16 to 18 comprises a plurality of elongate T-shaped hooks 420. The formation of the hook members 420 is such that an elongate T-shaped groove 422 is formed between adjacent hook members 420 which extends parallel to the longitudinal axis 415 of the base sheet 404 and extends from an upper edge 423 of the hooked material to a lower edge 424 thereof. Since the grooves 422 are straight, strands of hair may be retained in a straight form between adjacent elongate hooks 420. As shown in Figure 18, the heads of the hook members 420 has be provided with sloping upper surfaces 423 for guiding hair strands towards a groove 422.

In order for the lower strip of material 411 to connect with a strip of hooked material 406 comprising the elongate hook members 420 shown in Figures 16 to 18, the lower strip of material should preferably be provided with a plurality of hook members (for example, mushroom shaped hooks or elongate T-shaped hooks). Such hook members are more likely to securely connect with the elongate T-shaped hook members of the hooked material than loops or other fibrous material.