Method for pressure measurement

Details Method for pressure measurement Method for pressure measurement

1975-03-26

1977-01-18

Swisher, S. Clement

Measuring and testing

Ductility or brittleness

116114AM, G01L 100

Patent

active

040032450

ABSTRACT:
A method for measuring pressures which comprises allowing a material whose pressure is to be measured to press against a recording sheet to form a color image due to the pressure, and evaluating the changes in the optical color density of the color hue of the resulting color image on the recording sheet, the color image formation due to the pressure being effected by contacting a microcapsule layer containing a color former with a color developer layer under pressure.

REFERENCES:
patent: 2712507 (1955-07-01), Green
patent: 2730456 (1956-01-01), Green et al.
patent: 2730457 (1956-01-01), Green et al.
patent: 3427250 (1969-02-01), Hass
patent: 3469439 (1969-09-01), Roberts

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