Title:
PAPER HAVING DISCRIMINATION POWER OF ITSELF AND OTHERS
Document Type and Number:
Japanese Patent JP3451032
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain paper having a discrimination power of itself and others, capable of allowing itself and others to be discriminated by an iodine-starch reaction, and effective in a field of a printed paper for preventing counterfeit by allowing the paper to include a waterproof particulate composite of starch in the paper.
SOLUTION: Composite particulates of starch obtained by granulating starch grains with an anionic binder or a cationic binder, and coating the product with a counter-ionic cationic or anionic material, and having 50-500 μm particle diameters and waterproof properties are colored by using a pigment solution soluble in an organic solvent into the hue in the degree not reproduced by a color copy machine. The obtained composite particulates of the starch is added into a paper stock, and subjected to papermaking to provide the objective paper. The paper contains no (modified) starch without the composite particulate bodies of the starch, and has a discrimination power of itself and others by an iodine-starch reaction by dropping an aqueous solution containing iodine on the paper or dipping the paper into the aqueous solution.
Inventors:
Toru Murakami
Yasuhiko Asai
Yasuhiko Asai
Application Number:
JP11616399A
Publication Date:
September 29, 2003
Filing Date:
April 23, 1999
Export Citation:
Assignee:
Tokushu Paper Co., Ltd.
International Classes:
B42D25/30; D21H17/28; D21H21/46; G03G7/00; G03G21/04; (IPC1-7): D21H21/46; B42D15/10; D21H17/28
Domestic Patent References:
| JP5065608A | ||||
| JP63219698A | ||||
| JP26682A | ||||
| JP931897A | ||||
| JP62184199A | ||||
| JP9183802A | ||||
| JP11200281A | ||||
| JP10266095A |