double-tone ink
A printing ink consisting of a mixture of an
oil-soluble dye. a stable body pigment of a
different color, and a medium. Such inks are used
for the printing of halftones when a gravure
effect is desired. The halftone is actually
printed in the usual manner; however, sometime
later overtones appear on the print, due to the
dye of the ink spreading as a halo around the
printed dots forming the image. Paper finish and
tone also affect the result. (140 )
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