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单词 self-toning
释义

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self-toning
self-toning adj.
Brit. /ˌsɛlfˈtəʊnɪŋ/
,
U.S. /ˌsɛlfˈtoʊnɪŋ/
Photography (now historical) designating photographic paper in which the emulsion contains a chemical substance that allows the image to be toned during fixing, rather than in a separate process.
ΚΠ
1886 Photographer's World 15 Oct. 14/2 One labour-saving product of this establishment deserves to be noticed. It is the ready-sensitised and self-toning paper.
1950 Pop. Photogr. July 26/3 We have found du Pont's new Warmtone Projection Paper one of the most effective and easy-to-use ‘self-toning’ papers on the market.
2007 M. Osterman in M. R. Peres Focal Encycl. Photogr. (ed. 4) 111/2 Self-toning paper At the end of the 19th century some commercial collodion and gelatin printing-out papers were made available with the toner in the emulsion.
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