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View of City : 사이애노 타입 [ Cyano type ] 에 의한 표현 The Expressions with the Cyano type
강현덕 한국사진학회 1999 AURA Vol.6 No.1
The cyanotype(blue print) was invented by Sir. John F. W. Hersche in 1842. This process is simple in formula, cheap and permanent in preservation. The sensitizer of cyanotype is made of ferric ammonium citrate and potassium ferricyanide, and can be toned in the suitable solutions that contain tannic acid. The toning process employed were two types of 2 step immersion; toning followed by bleaching and bleaching followed by toning. The toning solution contains tannic acid(2%), and the bleaching solution contains sodium carbouate(1%) The results showed that when the cyanotype was toned first and then bleached, its image density was high and its color image took red brown tones, whereas when bleached first and then toned, its image density was low and its color image took black brown tones. The content of this works had descrfbed scenery which can be seen around the cities.