sulphate wood pulp
paper pulp made from wood chips cooked under pressure in a solution of caustic soda and sodium sulphide.
sulphite wood pulp
paper pulp made from wood chips cooked under pressure in a solution of bisulphite of lime.
Baryta (pronounced bah-RYE-tah) papers have their origin in the traditional darkroom as fiber-based silver gelatin prints typically used a white layer of barium-sulphate gelatin applied to the paper ground and beneath the light-sensitive layer to ...
The main component of fixer is sodium thiosulphate or ammonium thiosulphate. It is sometimes referred to as ‘hypo'.
Once development is complete, the undeveloped silver salts must be removed by fixing in sodium thiosulphate or ammonium thiosulphate, and then the film or paper must be washed in clean water.
Solution, usually based on sodium thiosulphate, in which films or prints are immersed after development to convert the unexposed silver halides in the emulsion to soluble products that can be washed out.
Rapid fixer
A fast fixing bath that includes ammonium thiosulphate or thiocyanate.
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A fast fixing bath that includes ammonium thiosulphate or thiocyanate.
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Silver halides ...
Hypo
Popular name for a fixing agent, derived from an abbreviation of hyposulfite of soda, the misnomer applied to sodium thiosulphate during the 19th century.
(see Fix)
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The film will look cloudy or milky and given exposure to light the remaining silver halides will be reduced to silver. The fixer, commonly sodium thiosulphate, ...
 See also: Film, Image, Light, Photograph, Camera
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