Pressure-sensitive copying paper
AssigneeThe Wiggins Teape Group Limited
InventorsMichael E. Hobson, Susan C. Tilbury
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Abstract
An extracted and isolated soy protein polymer is used for prevention of premature coloration in CFB pressure-sensitive copying paper which is neutral- or alkaline-sized with an alkyl ketene dimer and which utilizes an acid clay color developer composition. The soy protein polymer may be carried by the base paper, e.g. as a result of size press or size bath application, or may be present in the microcapsule coating.
Claims2
Pressure-sensitive copying paper comprising base paper neutral- or alkaline-sized with an alkyl ketene dimer and carrying on one surface a coating of pressure-rupturable microcapsules containing an oil solution of chromogenic material and on the other surface a coating of an acid clay colour developer composition, characterized in that an extracted and isolated non-particulate soy protein polymer is carried by the base paper and/or is present in the microcapsule coating.
Dependencies are inferred from the claim text.