also: しっぱん
noun
wet plate (photography)
Refers to the wet plate collodion process, a historical photographic technique.
湿板写真は19世紀に広く使われた技法です。
Wet plate photography was a widely used technique in the 19th century.
Compound of 湿 (shitsu, 'wet') and 板 (ban, 'plate'), referring to the wet plate used in early photography.