Useful english dictionary. 2012.
Gum bichromate — is a 19th century photographic printing process based on the light sensitivity of dichromates. It is capable of rendering painterly images from photographic negatives. Gum printing is traditionally a multi layered printing process, but… … Wikipedia
gum bichromate process — a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate. Also called gum dichromate process. [1895 1900] * * * … Universalium
gum bichromate process — a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate. Also called gum dichromate process. [1895 1900] … Useful english dictionary
gum-bichromate — adjective : gum dichromate … Useful english dictionary
Gum printing — is a way of making photographic reproductions without the use of silver halides. The process used salts of dichromate in common with a number of other related processes such as sun printing.When mixtures of mucilaginous, protein containing… … Wikipedia
Gum arabic — Gum arabic, a natural gum also called gum acacia, and chaar gund or char goond (in India), is the hardened sap taken from two species of the acacia tree, Acacia senegal and Acacia seyal . It is used primarily in the food industry as a stabilizer … Wikipedia
Potassium dichromate — Potassium dichromate … 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
Pyrotechnic composition — A pyrotechnic composition is a substance or mixture of substances designed to produce an effect by heat, light, sound, gas or smoke or a combination of these, as a result of non detonative self sustaining exothermic chemical reactions.… … Wikipedia
Photographic processing — is the chemical means by which photographic film and paper is treated after photographic exposure to produce a negative or positive image. Photographic processing transforms the latent image into a visible image, makes this permanent and renders… … Wikipedia
