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1910 Post Standard (Syracuse, N.Y.) 10 May 15/1 (advt.) Working foreman competent to take charge of medium sized pressroom. Must be familiar with process color work.

1926 F. B. Wiborg Printing Ink xx. 241 Process color inks. These inks are made exclusively for the purpose of printing pictorial subjects... Special process inks are made for this class of printing.]

1962 S. W. Hayter About Prints viii. 102 A print of Becker's, made from four plates each carrying a different colour (and in this case one of the four process colours used in reproduction).

1968 Heidelberg News Sept. 4/3 Only use process colour when it is justified. Four colour work is seen at its best, has most impact, alongside black and white.

1991 Personal Computer World Feb. 155/2 It's supposed to save you time and money by letting you separate colour PageMaker and TIFF files into the four process colours of cyan, magenta, yellow and black.