Title: Paper having microcapsules deposited in depressions on a surface thereof has improved smudge-resistance characteristics

Abstract: Paper for use in pressure-sensitive copying systems consists of a base paper one surface of which is machine glazed and the opposite surface of which is left rough due to expulsion of moisture during manufacture. Those sheets which are provided with a color reactant have the reactant applied to the glazed surfaces thereof and those sheets which are provided with a microcapsule coating have the microcapsule coating applied to the rough surfaces thereof.

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Inventors: Westcott, Lawrence (near Bridgend, WA, US)

Application Number: 724696
Filing Date: 1976-09-17
Publication_date: 1978-03-28
Assignee: Wiggins Teape Limited (London, EN)
Primary Class(es): 503/206 162/290, 427/150, 427/152, 428/173, 428/206, 428/207, 428/212, 428/537.5, 428/914, 503/226
Other Classes:
US Patent Ref:

3111407	Nov, 1963	Lindquist et al.	282/28.
3389007	Jun, 1968	Oda et al.	428/323.
3411935	Nov, 1968	Winzer	428/173.
3536517	Oct, 1970	VAN DEN Heuvel et al.	428/306.
3753761	Aug, 1973	Sugahara et al.	428/306.

Other Refs:
Primary Examiner: Cannon, J.C.
Assistant Examiner:
Attorney: Burns, Doane, Swecker & Mathis