Thermal imaging method

Details Thermal imaging method Thermal imaging method

B - Operations, Transporting

41

M

42/3

B41M 5/323 (2006.01)

Patent

CA 1254038

THERMAL IMAGING METHOD 7133 Abstract of the Disclosure A thermal imaging method is provided which employs as color-forming co-reactants, (a) a substantially colorless di- or triarylmethane compound possessing on the meso carbon atom within its triarylmethane structure an aryl group substituted in the ortho position with a nucleophilic moiety which is ring-closed on the meso carbon atom and (b) an electrophilic reagent which upon heating and contacting said di- or triarylmethane compound undergoes a bimolecular nucleophilic substitution reaction with the nucleophilic moiety to form a colored, ring-opened di- or triarylmethane compound.

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