Pyro

(n.) Abbreviation of pyrogallic acid.

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• When attacked by pyro, those silver bromide particles which have been affected by light--and only those--change to black metallic silver. 佚名. 神奇的知识之书.
• It is the particular business of a chemical called pyro to release this latent image. 佚名. 神奇的知识之书.
• The image is latent, until it is developed by pouring over the plate a mixture of pyro-gallic acid in distilled water, acetic acid, and nitrate of silver. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.

编辑:罗达