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...
Patent
1994-04-26
1996-02-27
Hess, B. Hamilton
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...
503216, 503217, 503221, B41M 530
Patent
active
054948827
ABSTRACT:
It is provided with a thermal recording material having a support coated with a coating solution as a color developing layer. The color developing layer has a colorless dye precursor which is normally colorless or light-colored, and a developer which reacts with the dye precursor to cause color development thereof upon heating. The developer is a bisthiourea compound represented by, for example, a formula (A-2): ##STR1## and the thermal color developing layer contains no sensitizer. In the thermal recording materials of the present invention, substantially no color is developed at a temperature of 120.degree. C. while color development can be caused in response to heating with a thermal head or a laser beam. The developed color on the material can be erased upon contacting with alcoholic solvents, depending on the thiourea compound contained in the color developing layer. After erasure of the image, the material can be used again for recording with a thermal head or a laser beam.
REFERENCES:
patent: 5260253 (1993-11-01), Kawakami et al.
Recent Trends of Reuse of Recording Paper and Reversible Recording Media, Chemical Products R and D Center, Richoh Company Limited, 1993.
Hayasaka Hideki
Nagai Tomoaki
Satake Toshimi
Sekine Akio
Takano Toshiyuki
Hess B. Hamilton
Nippon Paper Industries Co. Ltd.
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