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Silver chloride

Photography SilverSilver grains

Silver chloride is a chemical compound with the chemical formula AgCl. This white crystalline solid is well known for its low solubility in water (this behavior being reminiscent of the chlorides of Tl+ and Pb2+).

 


silver chloride
a white granular powder that turns dark on exposure to light.
silver halide
a silver salt such as silver chloride, silver bromide, or silver iodide suspended in a gelatin used in photographic film production.

1834: Henry Fox Talbot creates permanent (negative) images using paper soaked in silver chloride and fixed with a salt solution. Talbot created positive images by contact printing onto another sheet of paper.

The emulsion consists of gelatin containing light sensitive silver halide crystals such as silver bromide and silver chloride. In practice the film will consist of many other layers.

A warm-tone printing paper that has silver chloride and silver bromide emulsion A photographic paper coated with an emulsion made up of both silver chloride and silver bromide.

This was mixed with silver chloride and coated onto paper. The surface could be matte, glossy, or semi-gloss like an albumen print. The whites of the image generally lack the yellowish cast of albumen prints.

Paper is soaked with weak salt solution, then silver nitrate is brushed on, and the result is silver chloride. Finished prints have a beautiful delicacy in the lighter tones, but slightly lack in detail overall.

EMULSION (SILVER HALIDE)-A suspension of light-sensitive silver salt, especially silver chloride or silver bromide, in a colloidal medium, usually gelatin, used for coating photographic film, plates, or papers.

In the 15th century, Robert Boyle found out that silver chloride turned dark when exposed to air and not light.
In the early 1800's Angelo Sala observed that when silver nitrate powder is kept in the sun for long, it turns black. ...

A chemical compound of silver (usually silver bromide, silver chloride and silver iodide) used as the light-sensitive constituent (emulsion) in films.

-Chlorobromide paper - photographic paper coated with an emulsion made up of both silver chloride and silver bromide. Used for producing enlargements with a warm, slightly brownish-black image, especially if processed in a warm tone developer.

These halides are produced through reactions with bromine (silver bromide - AgBr), iodine salts (silver Iodide - AgI) or in the presence of chloride ions (silver chloride - AgCl).

See also: Photograph, Image, Silver, Light, Print