| 单词 | pyro-soda |
| 释义 | > as lemmaspyro-soda Forming the names of developers consisting of solutions of pyrogallol with another substance, as pyro-metol, pyro-soda, etc. ΚΠ 1885 C. G. W. Lock Workshop Receipts 4th Ser. 357/1 The pyro-lime developer becomes violet and brown in use. 1890 Internat. Ann. Anthonys Photogr. Bull. 108 Now a word about developers. I have tried them all... Ferrous oxalate pyro-soda, pyro-potash, hydroquinone, etc. 1907 Westm. Gaz. 2 Mar. 18/2 A green-brown or brown-black colour, such as is given by a pyro-metol developer or pyro-soda not too heavily dosed with sulphite. 1921 Glasgow Herald 23 Mar. 8 Where pyro-soda developer is used many may prefer an acid hypo solution of about the same strength. 1955 B. C. L. Kemp Elem. Org. Chem. (new ed.) xxii. 292 Pyrogallol is employed as a photographic developer, an alkaline solution of this substance being the basis of the well-known developer ‘pyro-soda’. 2000 S. G. Anchell Darkroom Cookbk. (ed. 2) iv. 42 Other superadditive combinations are pyro-metol, metol-ascorbic acid, [etc.]. < as lemmas |
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