Equilibrium and ambient relative humidity indicator

Details Equilibrium and ambient relative humidity indicator Equilibrium and ambient relative humidity indicator

1988-01-22

1989-08-08

Yasich, Daniel M.

Measuring and testing

Moisture content or absorption characteristic of material

73336, 235 89R, 374142, G01N 2556, G01W 102

Patent

active

048541605

ABSTRACT:
A temperature and humidity indicator is provided by a plurality of liquid crystals sensitive to different temperatures which form a graduated scale and a plurality of paper segments impregnated with an inorganic salt sensitive to humidity forming a second graduated scale on a supporting sheet. The crystals change color with temperature and the paper segments change color with humidity. The two scales provide the vertical and horizontal axes of a table of equilibrium relative humidity and ambient relative humidity values for paper sheets or rolls to be printed on and the air surrounding the sheets. Readings are taken from the table to determine the differences in himidity between the air and paper. A second parameter table indicates ranges of differences which should not be exceeded under various printing conditions in order to prevent the occurrence of printing problems.

REFERENCES:
patent: 1162446 (1915-11-01), Bristol
patent: 2249867 (1941-07-01), Snelling
patent: 2799167 (1957-07-01), Loconti
patent: 3214975 (1965-11-01), Solecki
patent: 3704625 (1972-12-01), Seto et al.
patent: 4034609 (1977-07-01), Fuller
patent: 4150570 (1979-04-01), Fuller
patent: 4154104 (1979-05-01), Worthington
patent: 4464064 (1984-08-01), D'Luzansky
patent: 4538926 (1985-09-01), Chretien

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