Chrysotype

Chrysotype

Chrysotype (also known as a chripotype or gold print) is a photographic process invented by John Herschel in 1842. Named from the Greek for "gold", it uses colloidal gold to record images on paper.

Herschel's system involved coating paper with ferric citrate, exposing it to the sun in contact with an etching used as mask, then developing the print with a chloroaurate solution. This did not provide continuous-tone photographs.

The modern chemist and photographic historian Dr Mike Ware has experimented with a reinvention of the process giving more subtle tones.

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  • Chrysotype — Chrys o*type, n. [Gr. chryso s gold + type.] 1. A photographic picture taken upon paper prepared by the use of a sensitive salt of iron and developed by the application of chloride of gold. Abney. [1913 Webster] 2. 2process, invented by Sir… …   The Collaborative International Dictionary of English

  • Calotype — or talbotype is an early photographic process introduced in 1841 by Henry Fox Talbot, using paper coated with silver iodide. The term calotype comes from the Greek el. κάλο for good , and el. τύπος for impression . How calotypes work The… …   Wikipedia

  • List of photographic processes — This page list various photographic processes.Color*Chromogenic positive (Ektachrome) **E 4 process **E 6 process *Chromogenic negative **C 41 process **RA 4 process *Dye destruction **Cibachrome **Ilfochrome *Kodachrome **K 12 process **K 14… …   Wikipedia

  • Colloidal gold — Part of a series of articles on Nanomaterials Fullerenes …   Wikipedia

  • Mike Ware (photographer) — Mike Ware is a chemist and photographer, known for his work in alternative photographic processes, earlier methods of printing photographic images that were succeeded by the more common silver gelatin used today. His website includes practical… …   Wikipedia

  • Siderotype — is an iron based photographic print. [http://books.google.com/books?id=J6QRAAAAIAAJ pg=RA2 PA622 dq=Siderotype lr= num=20 client=firefox a] The term was coined by Sir John Frederick William Herschel. [http://books.google.com/books?id=9 sEAAAAQAAJ …   Wikipedia

  • Chrysotypie — Die Chrysotypie, auch Golddruck, ist ein von John Herschel 1842 erfundenes fotografisches Edeldruckverfahren. Er benannte es nach dem griechischen Namen für Gold (chryso), weil für die Herstellung der fotografischen Papierbilder kolloidales Gold… …   Deutsch Wikipedia

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