Reactive color developing substrates for manifold copy systems a

Details Reactive color developing substrates for manifold copy systems a Reactive color developing substrates for manifold copy systems a

1974-07-01

1976-11-02

Welcome, Joan E.

Textiles: manufacturing

106 145, 106 19, 106 20, 106288B, 106309, 428913, B41L 120, B41M 516, C08K 334, C09C 300

Patent

active

039892786

ABSTRACT:
Improved reactive color developing substrates for manifold copy systems are produced by controlled acid treatment of smectite clay minerals, followed by severe attrition grinding to produce an aqueous colloidal suspension of the acid treated smectite. Thereupon, the colloidalized acid treated smectite is combined with an aqueous suspension of platy kaolinite, thoroughly blended and co-precipitated by the addition of appropriate flocculants such as aluminum sulfate.

REFERENCES:
patent: 3372043 (1968-03-01), Fanselow
patent: 3455721 (1969-07-01), Phillips, Jr. et al.
patent: 3615806 (1971-10-01), Torok et al.
patent: 3622364 (1971-11-01), Sugahara et al.
patent: 3723174 (1973-03-01), Swanson et al.
patent: 3753761 (1973-08-01), Sugahara et al.
patent: 3849151 (1974-11-01), Abercombie, Jr.

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