Title:
DISCOLORATION AGING INDICATOR
Document Type and Number:
Japanese Patent JP3109875
Kind Code:
B2
Abstract:
PURPOSE: To achieve a long-term use owing to discoloration with time according to environmental conditions by providing a layer containing a cyanine dye and a specific oil-soluble resin and a layer containing a resin whose pH value is larger than 7 as an emulsion on a base.
CONSTITUTION: Mutually adjacent first and second layers 1, 2 and a third layer 3 as needed are provided on a base 4. The first layer 1 has an essential ingredient of oil-soluble resin with cyanine dye and carboxyl group or phenol hydroxide group and includes a stabilization coloring matter and a resin with increased viscosity as needed. The second layer 2 has an essential ingredient of a resin whose pH value is larger than 7 as an emulsion and includes the resin with increased viscosity as needed. The third layer 3 contains a hygroscopic macromolecule which is dissolved in water and/or fat alcohols. Then, a plurality of each layers may be provided and further the third layer 3 may be abbreviated.
Inventors:
Toshiki Fujisawa
Application Number:
JP28856491A
Publication Date:
November 20, 2000
Filing Date:
November 05, 1991
Export Citation:
Assignee:
Sakura Crepas Co., Ltd.
International Classes:
C09K3/00; G01K11/12; G01N21/81; G04F1/00; G04F13/00; (IPC1-7): G04F1/00
Domestic Patent References:
| JP536441A | ||||
| JP6052686A | ||||
| JP54126682A | ||||
| JP4505213A |
Attorney, Agent or Firm:
Eiji Saegusa (4 others)