Record material

Details Record material Record material

B - Operations, Transporting

41

M

42/11

B41M 5/136 (2006.01)

Patent

CA 1224036

ABSTRACT RECORD MATERIAL Pressure sensitive record material uses a 2,3-disubstituted- 1,2,3,4-tetrahydroquinazolin-4-ones of the formula (I): Image where R1 and R2 have defined meanings, as colour formers. Preferred compounds of formula (I) are intense fade resistant and stable yellow colour formers useful in making black copy formulations.

466986

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