received by the International Bureau on 24 July 2020 (24.07.2020)

1. Process for avoiding the inner burrs when demoulding the reconstructed stone and decorative panels, characterized in that it comprises the following steps: Step 1 , selecting the type of reconstructed stone or decorative panel to be multiplied ; Step 2, assembly of natural stone slabs to a suitable size of maximum 1 m/1 m so that they can be handled, so that a conventional external surface with the desired pattern is obtained ; Step 3, impregnating the surface with the desired pattern in a plastic mass that can take in-depth the traces, the streaks and the troughs specific to the natural stone in order to obtain the negative mould 1 ; Step 4, in the negative mould 1 , a plastic mass different from that of the negative mould 1 is poured, with the same rendering qualities of the surface pattern on which it is poured, obtaining one or more positive moulds 1 (fig.1), which render / reproduce identically the surface of the natural stone slabs ; outer edges, corresponding to the intersection of the conventionally outer surface with the lateral surfaces, remaining unprocessed ; the inner edges, corresponding to the intersection of the side surfaces with the conventional inner surface, being bevelled on the contour, minimum 2 mm to maximum 10 mm x 45°; Step 5, a plastic mass of the same material as that of the negative mould 1, or another plastic mass having similar qualities with the positive mould 1, is impregnated at flow temperature in order to obtain one or more negative moulds 2 (fig.2), having a thickness between 10 - 100 mm ; between the side surfaces of negative moulds 2 being 10 - 50 mm decks which, on the contour, will have from casting an inner shoulder of minimum 2 mm and maximum 10 mm x 45° (fig.3). Step 6 in the negative mould/moulds 2 pour the mixture of cement and plaster,

8 which is pressed with a press whose entire surface of contact with the cement or plaster mixture is substantially porous ; by reinforcing the mixture, identical reconstructed stone tiles (fig. 4), and/or identical decorative panel tiles are obtained, which will have; a) a previous conventional outer surface, with the pattern reproduced of natural stone; b) a substantially porous inner conventional surface ; this surface will be placed on the wall and comes into contact with the binder; c) a finely processed contour surface from the casting; d) the chamfering of minimum 2 mm and maximum 10 mm x 45° on the contour at the inner edge between the finely processed contour surface and the conventional porous inner surface ; due to the elasticity of the material of the negative mould / moulds 2, the slabs being easily removed from the mould, without them being deformed or broken ; Step 7, control, packaging of finished parts and storage.

2. Finished product - reconstructed stone - as result by the process for the avoidance of the conventional inner burrs when demoulding reconstructed stone and decorative panels, characterized in that it is obtained without burrs, directly by casting and drying a mixture of cement or plaster that is poured in a negative mould 2 made of a plastic mass that can take in depth the traces, the streaks and the troughs specific to natural stone ; negative mould 2 whose upper edges have in section, on the entire upper contour, the negative shape of a uniform inner shoulder of minimum 2 mm and maximum 10 mm x 45° ;

3. Finished product - decorative panel - as result of the process for the avoidance of the conventional inner burrs when demoulding reconstructed stone and decorative panels, characterized in that it is obtained without burrs, directly by casting and drying a mixture of cement or plaster that is poured in a negative mould made of a plastic mass that can take in depth the traces, the streaks and the troughs specific to natural stone ; negative mould whose upper edges have in section, on the entire upper contour, the negative shape of a uniform inner shoulder of minimum 2 mm and maximum 10 mm x 45°

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