duotone, n.
(ˈdjuːəʊtəʊn)
[f. duo- + tone n. 10.]
A half-tone illustration printed in two colours from two plates made from the same original, but using different screen angles; also, the process by which such an illustration is printed. Also attrib.
| 1907 Amstutz & Jenkins Hand-Bk. Photoengraving viii. 406 Duo-tones, the printing of two superposed impressions from one engraved half-tone plate, in two colors, one a black and the other a tint, placing them slightly out of register, but in alignment; or the printing of two superposed colors from two separate plates. 1913 Dial 16 Dec. 530/1 Of the numerous illustrations..some are ‘collotype plates’,..and..others..are ‘duo-tone illustrations’. 1967 Karch & Buber Offset Processes v. 174 A true duotone is a two color reproduction made by two halftone negatives at two different screen angles, with the halftone plates printed in complementary colors. 1971 Publishers' Weekly 23 Aug. 63 The extensive coverage in this issue of ‘The New Gift and Art Books’,..including a 16-page duotone picture portfolio of outstanding books. |
Passing into general use as adj.
| 1934 Webster, Duotone, having or yielding two tones or colours. 1966 ‘A. Hall’ 9th Directive vi. 61 The duotone Chevrolet in the main parking area was moving away. |