Color developer sheet for pressure-sensitive recording

Details Color developer sheet for pressure-sensitive recording Color developer sheet for pressure-sensitive recording

1987-11-17

1989-04-25

Robinson, Ellis P.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified reactant isolating material or capsule wall...

427150, 428914, 503219, 503225, B41M 516, B41M 522

Patent

active

048248258

ABSTRACT:
A color developer sheet for pressure-sensitive recording containing as a color developer only novolak phenol resin or novolak phenol resin and a semi-synthetic solid acid, and as a binder an acrylamide-acrylic acid copolymer can prevent yellowing of the color developer sheet and give higher developed color density.

REFERENCES:
patent: 3859112 (1985-01-01), Kohmura et al.
patent: 4642662 (1987-02-01), Torii et al.
patent: 4665410 (1987-05-01), Iiyama et al.

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