Coloring method by use of new yellow dyestuff and coloring...

Details Coloring method by use of new yellow dyestuff and coloring... Coloring method by use of new yellow dyestuff and coloring...

B - Operations, Transporting

41

M

8/1.5

B41M 5/035 (2006.01) D06P 1/06 (2006.01)

Patent

CA 1329967

ABSTRACT OF THE DISCLOSURE An improvement is provided in a gas phase thermal transfer printiny method in which a volatilizable dyestuff in the form of a heat-releasable coating on a surface of a transfer substrate is pressed against a face of a printable substrate, while the transfer substrate is heated to the volatilization temperature of the dyestuff, thereby transferring the pattern of the dyestuff from the transfer substrate to the printable substrate. The improvement involves the use of the following dyestuff, namely a yellow pyridone of the Formula: (I) Image wherein R1 is a lower alkyl group, and R2 is an alkyl group, alkoxyalkyl group, aralkyl group, cycloalkyl group, alkenyl group or lower alkoxycarbonylmethyl group.

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