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Photography by Paul de Delve


Glossary of Photographic Techniques & Terms



BROMIDE PRINT Traditional photographic paper Coated with Gelatin containing silver bromide giving a cold black and white image.

CHLOROBROMIDE PRINT B/W paper containing a mixture of silver chloride and silver bromide giving a warm brownish black image.

BROMOCHLORIDE PRINT B/W paper with a mixture of silver bromide and silver chloride giving a warmish black brown image.

TONING B/W image treated to give a variety of tones Blue, Yellow Brown, Brown, Purple Brown, Gold, Selenium.

MULTIPLES Numerous images exposed on one negative.

SOLARISATION The Sabattier effect discovered by Armand Sabattier (1834-1890) A partially reversed image giving a negative/positive linear effect.

CLASSIC PHOTOGRAPHY Term given to the following nineteenth century photographic techniques:

CYANOTYPE - Invented by Sir John Herschel in 1842 - known as the "blue print" process, a blue photographic image on water colour paper. Also used for many years for duplicating technical drawings.

GUM BICHROMATE PRINT Successfully introduced in 1894 Gum Arabic dissolved in water with a water based pigment and either potassium or ammonium dichromate, coated onto water colour paper or any other suitable base.

KALLITYPE or VAN DYKE PRINT Introduced circa 1898 by W.J. Nichol based on the experiments of Sir John Herschel sensitised water colour paper resulting in a Van Dyke Brown Photographic image.


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