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Specimen book of the Norwood Press, showing samples of hand and machine type equipment and presswork in black and colors; (1916)

Norwood Press · Norwood, Mass., Norwood Press · leaf 358

An illustration from Specimen book of the Norwood Press, showing samples of hand and machine type equipment and presswork in black and colors;, 1916, leaf 358 — 293. Three-color Printing. — The frontispiece in thisbook illustrates a three-color print of much interest. Sucha print is made up of very fine lines and dots of the threepigments, red, yellow, and blue ; the various colors in thepicture are mixtures of these three with the white of thepaper. The… … THREE-COLOR PRINTING (See page 236) COLOR 237 The process is briefly as follows : Three negatives ofthe same original are taken through transparent screens ofred, green, and blue, and each is crossed by fine lines ordots. Copper plates are made from the negatives, and eachplate is inked for…

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