Title:
COATING FOR HUMIDITY INDICATOR, METHOD FOR PRODUCTION OF THE COATING, HUMIDITY INDICATOR USING THE COATING
Document Type and Number:
WIPO Patent Application WO/2007/125953
Kind Code:
A1
Abstract:
Disclosed is a humidity indicator which contains no heavy metal and has good visibility of a color change that occurs when the humidity is increased. The humidity indicator can be produced by: applying an aqueous coating comprising a leuco dye, an acidic compound which is in a solid state at ambient temperature, a deliquescent substance and an aqueous resin emulsion onto a substrate such as a resin film, a non-woven fabric or a paper; and heating and drying the resulting product.
Inventors:
NAKATSUBO KUNIO (JP)
OGAWA TATSUYA (JP)
OTOMO HITOSHI (JP)
FUJISAKI MIDORI (JP)
OGAWA TATSUYA (JP)
OTOMO HITOSHI (JP)
FUJISAKI MIDORI (JP)
Application Number:
PCT/JP2007/058939
Publication Date:
November 08, 2007
Filing Date:
April 25, 2007
Export Citation:
Assignee:
KYODO PRINTING CO LTD (JP)
NAKATSUBO KUNIO (JP)
OGAWA TATSUYA (JP)
OTOMO HITOSHI (JP)
FUJISAKI MIDORI (JP)
NAKATSUBO KUNIO (JP)
OGAWA TATSUYA (JP)
OTOMO HITOSHI (JP)
FUJISAKI MIDORI (JP)
International Classes:
G01N21/81; G01N31/00; G01N31/22; G01W1/11
Domestic Patent References:
| WO2005053821A1 | 2005-06-16 |
Foreign References:
| JPS58216936A | 1983-12-16 | |||
| JP2000105230A | 2000-04-11 | |||
| JPH10253541A | 1998-09-25 | |||
| JPH01201364A | 1989-08-14 | |||
| JPH09292384A | 1997-11-11 | |||
| JP2002350419A | 2002-12-04 | |||
| JPH10267852A | 1998-10-09 | |||
| JP2003130863A | 2003-05-08 | |||
| JPH0534334A | 1993-02-09 | |||
| JPH07174704A | 1995-07-14 |
Other References:
See also references of EP 2012112A4
Attorney, Agent or Firm:
WATANABE, Keisuke et al. (Mitsui Sumitomo Ginko Okachimachi Bld.11-4, Taito 4-chome,Taito-ku, Tokyo 16, JP)
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