Color-developing sheet including phenol-formaldehyde resin,...

Details Color-developing sheet including phenol-formaldehyde resin,... Color-developing sheet including phenol-formaldehyde resin,...

B - Operations, Transporting

41

M

42/16

B41M 5/16 (1980.01)

Patent

CA 1133251

ABSTRACT OF THE DISCLOSURE A color-developing sheet for use in a no-carbon copying system, which contains a layer of a combination of an active silicic acid compound with a phenolic resin, is improved in preventing yellowing during the preservation thereof, in giving high color intensity and stability to the image formed, by incorporating titanium dioxide into the layer.

340096

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