Recording sheet

Details Recording sheet Recording sheet

1977-03-28

1978-07-04

Lesmes, George F.

Measuring and testing

Volumetric content measuring

116DIG34, 282 275, 427150, 427151, 427152, 427258, 428307, 428320, 428322, 428323, 428914, B41M 516, G01L 100

Patent

active

040981142

ABSTRACT:
A recording sheet, especially useful for measuring pressures of 1 to 2,000 kg/cm.sup.2 with a high degree of accuracy, comprising a support, a recording layer thereon, and a protective layer of a transparent synthetic resin provided on top of the recording layer by extrusion coating, the recording layer containing microcapsules having a .delta./D ratio (as defined in the specification hereof) of about 1.5 .times. 10.sup.-3 to about 2.5 .times. 10.sup.-1.

REFERENCES:
patent: 2929736 (1960-03-01), Miller et al.
patent: 3469439 (1969-10-01), Roberts et al.
patent: 3647504 (1972-03-01), Hayes et al.
patent: 3906123 (1975-09-01), Vincent et al.
patent: 4003245 (1977-01-01), Ogata et al.

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