Method of indicating the presence of an impregnant in a substrat

Details Method of indicating the presence of an impregnant in a substrat Method of indicating the presence of an impregnant in a substrat

1980-06-23

1982-01-19

Tungol, Maria Parrish

Bleaching and dyeing; fluid treatment and chemical modification

Coating or sizing with dyeing process or product

8490, 1510493, 424 26, 424 25, D06P 500, A61L 218, D06P 513

Patent

active

043114792

ABSTRACT:
The invention is a method of indicating the presence of an impregnant, e.g. an antimicrobial composition, in cloth to provide visual evidence of the continuing activity of the impregnant. The antimicrobial composition in the cloth is activated on contact with a liquid such as water and is ionically bonded to the cloth. Small portions of the impregnated cloth are dyed with an indicator dye which bonds preferentially to the antimicrobial composition so that when the antimicrobial composition is exhausted, the dye will disappear from the cloth. The dye is preferably applied to the cloth in stripes.

REFERENCES:
patent: 805560 (1905-11-01), Kohn
patent: 1933302 (1933-10-01), Aurand
patent: 2449274 (1948-09-01), Broll
patent: 2702780 (1955-02-01), Lerner
patent: 3530030 (1970-09-01), Adams et al.
patent: 3536437 (1970-10-01), Rogovin
patent: 3663262 (1972-05-01), Cogan
patent: 3987797 (1976-10-01), Stephenson

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