Collodion

Japanese: collodion
Collodion

...A photographic method that uses silver iodide collodion emulsion. Also called "shitsuban," collodion (nitrocellulose dissolved in ether) is used as the emulsion binder, and silver iodide crystallites are dispersed in it to create collodion photographic emulsion. This emulsion is applied to a glass plate, and the plate is not allowed to dry after dripping off (hence the name wet plate), and then the plate is mounted in a camera to take a photograph. For this reason, wet plate photography requires the photographer to prepare the photosensitive material by mixing the collodion emulsion just before use. After the photograph is taken, the wet plate is developed using a solution of ferrous sulfate or similar as a developer.

*Some of the terminology that mentions "collodion" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ヨウ化銀コロジオン乳剤を使う写真法の一つ。〈しつばん〉ともコロジオン(ニトロセルロースをエーテルに溶解したもの)を乳剤の結合剤とし,これにヨウ化銀微結晶を分散してコロジオン写真乳剤を作る。この乳剤をガラス板に塗布し,余滴を落として乾かさない(このことから湿板の名がある)でカメラに装置して写真を撮影する。このため,湿板写真では撮影者が使用直前にコロジオン乳剤を調合して感光材料を準備する必要がある。撮影後は湿板を硫酸第一鉄などの溶液を現像液として現像する。…

※「collodion」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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