Cyanotype Print
The cyanotype is where the word blueprint comes from. Sir John Herschel invented it in 1842, and he was not trying to make art — he wanted a cheap way to copy mathematical tables. It was quickly adopted for reproducing technical drawings, and for the better part of a century an engineering drawing was literally a white line on a blue ground.
The chemistry is two iron salts: ferric ammonium citrate and potassium ferricyanide. Brushed onto paper and dried in the dark, the coating is sensitive to ultraviolet. Where UV strikes it, the iron is reduced and reacts to form Prussian blue, which lodges permanently between the paper fibres. Where something blocked the light, it washes away white.
No darkroom, no enlarger, no developer. Sunlight and water. It remains one of the oldest photographic processes still in everyday use.
Maudhui hatari
Blueprint hii ina taratibu za hatari. Ingia na uwashe maudhui ya hatari katika mipangilio ya akaunti yako ili kuona maagizo ya hatua kwa hatua.
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.