Record material carrying a colour developer composition

Details Record material carrying a colour developer composition Record material carrying a colour developer composition

B - Operations, Transporting

41

M

42/1

B41M 5/00 (2006.01) B41M 5/155 (2006.01)

Patent

CA 1159648

ABSTRACT RECORD MATERIAL CARRYING A COLOUR DEVELOPER COMPOSITION A colour developer for use in a pressure- or heat- sensitive record material comprises a particulate amorphous hydrated silica/hydrated alumina composite in which the hydrated silica and hydrated alumina are chemically bound, in which hydrated silica predominates, in which the mean alumina content on a dried weight basis is at least 7.5%, based on the total weight of silica and alumina, and in which the surface area is below 300m2g-1. The composite may be metal-modified.

379701

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