Pressure sensitive recording sheet

Details Pressure sensitive recording sheet Pressure sensitive recording sheet

1987-10-26

1989-04-18

Hess, Bruce H.

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, 427151, 428342, 428914, 503207, 503215, 503225, B41M 516

Patent

active

048227684

ABSTRACT:
A pressure-sensitive recording sheet which forms a colored image by the reaction of an electron donating color former with an electron accepting developer, comprising a support having provided thereon a micro-encapsulated electron donating color former and an electron accepting developer is disclosed, wherein one or more layers containing the microencapsulated electron donating color former contains at least one pigment having a pH of 8.5 or more.

REFERENCES:
patent: 3894168 (1975-07-01), Brockett et al.
patent: 4154462 (1979-05-01), Golden et al.
patent: 4162165 (1979-07-01), Schwab
patent: 4327939 (1982-05-01), Ehrhardt et al.
patent: 4404251 (1983-09-01), Jabs et al.
patent: 4448446 (1984-05-01), Flores
patent: 4486762 (1984-12-01), Okamoto et al.
Shibazaki, "The Effect of Fine Calcium Carbonate Particles Upon the Coated Paper", Learned Society of Polymer in Japan, 6/25/82.

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