Color developing substrates for manifold copy systems and proces

Details Color developing substrates for manifold copy systems and proces Color developing substrates for manifold copy systems and proces

1974-07-29

1976-05-18

Douglas, Winston A.

Compositions: coating or plastic

Materials or ingredients

Miscellaneous

106288B, 252450, C09C 102, C09C 142

Patent

active

039575276

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 talc, thoroughly blended and co-precipitated by the addition of appropriate flocculants such as aluminum sulfate.

REFERENCES:
patent: 3533821 (1970-10-01), Lundquist
patent: 3622364 (1971-11-01), Sugahara et al.
patent: 3753761 (1973-08-01), Sugahara et al.

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