Stabilization of thermal images

Details Stabilization of thermal images Stabilization of thermal images

1991-11-20

1993-05-11

Schwartz, Pamela R.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Method of use, kit, or combined with marking instrument or...

106 21R, 427151, 430200, 503202, 503204, 503209, 503218, 503221, B41M 530

Patent

active

052100642

ABSTRACT:
The addition, to a thermal imaging medium comprising a color-forming compound which undergoes a change of color upon heating above a color-forming temperature for a color-forming time, the color-forming compound being of the cyclic sulfonamide type described in U.S. Pat. Nos. 4,720,449 and 4,960,901, of a quinone or hydroquinone increases the sensitivity of the imaging medium and helps to prevent fading of images produced therefrom while the images are being projected.

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