| 释义 |
▪ I. half-tone, n.
1. Mus. = semitone.
1651[see tone n. 4]. 1880A. J. Hipkins in Grove Dict. Mus. I. 685/1 The mechanism for raising the pitch of the strings [of a harp] one half tone..or two half tones.
2. Art. A tone intermediate between the extreme lights and extreme shades; one of the lighter shadows of a photograph, engraving, picture, etc.; esp. in Printing and Photogr., a photo-mechanical illustration printed from a block in which the tones are broken up into small or large dots by the interposition of a glass screen, ruled with fine cross-lines, between the camera and the object; this process. Also attrib.
1867G. W. Simpson Photographs in Pigments 51 The imperative condition upon which half-tone depends, the exposure of one side of the film to light..seemed to present an insuperable difficulty. 1875tr. Vogel's Chem. Light xv. 251 The pictures were especially wanting in half-tones. 1894Wilson Cycl. Photogr. 179 A picture without half tones is harsh. 1894Times 31 Jan. 3/3 The making of the blocks for the half-tone illustrations. 1911Encycl. Brit. XIV. 325/1 Half-tone blocks..were used in the Graphic from 1884. 1937E. J. Labarre Dict. Paper 155/1 Halftone paper, a printing paper suitable for printing half-tone blocks. 1940Chambers's Techn. Dict. 399/2 Half-tone process, a process of photographic reproduction in which the varying tones of the original are photographically translated into dots of uniform tone but varying size. 1958Times Lit. Suppl. 17 Jan. 35/2 Such subjects as colour correction by masking, three-colour half-tone printing. 1959House & Garden July 92/4 The publisher has had the sensible idea of backing his colour⁓plates..with half-tones in black-and-white. 1961T. Landau Encycl. Librarianship (ed. 2) 160/2 Half-tone screens, transparent plates ruled diagonally with opaque lines at right angles to each other. 1967Karch & Buber Offset Processes 541 Halftone screen, the ruled, plate glass dot-forming device used to translate continuous tones into halftones.
▪ II. † half-tone, v. Obs. rare—0.
(?) To sing or play in semitones.
1483Cath. Angl. 171/1 To Halfe tone, semitonare. |