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US 4,784,692 AGranted
Color-developing agent for pressure-sensitive recording sheet and color-developing sheet thereof
AssigneeJujo Paper Co., Ltd.
InventorsHiroaki Umeda, Mamoru Suzuki, Akira Hasegawa, Kunio Hata
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Abstract
The color-developing agent for pressure-sensitive recording sheet comprises a reaction product of carboxylated terpenephenol resin, aromatic carboxylic acid and polyvalent metal compound. The color-developing sheet containing the above color-developing agent provides an excellent color-developing rate and an improved light fastness.
Claims6
A color-developing agent for pressure-sensitive recording sheet which comprises a reaction product of carboxylated terpenephenol resin, aromatic carboxylic acid and polyvalent metal compound.
Dependencies are inferred from the claim text.