Heat sensitive system and use thereof

Details Heat sensitive system and use thereof Heat sensitive system and use thereof

B - Operations, Transporting

41

M

B41M 5/26 (2006.01) B41M 3/14 (2006.01) B41M 5/30 (2006.01) B41M 5/337 (2006.01)

Patent

CA 2149947

A heat sensitive system comprises a document having a localized, non-pressure sensitive, coating of chromogenic composition activated at moderate temperatures. Quickly striking the chromogenic composition with a fingernail or blunt object produces a colored image by frictional heat. The chromogenic composition contains a chromogenic compound and a color developer which are non-pressure sensitive and non- reactive at room temperature. The chromogenic composition can be an intimate mixture of the chromogenic compound and the developer or alternatively separate layers of each of the components.

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