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Negative

In many photographic processes a negative is considered a master image from which other prints are produced. Negatives have been produced on glass and chemical coated plastic. In 35mm photography, the image is captured onto unexposed film which produces the negatives. A negative image is a tonal inversion of a positive image, in which light areas appear dark and vice versa. A negative colour image is additionally colour reversed, with red areas appearing cyan, greens appearing magenta and blues appearing yellow.

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Beatrice Tunstall
by Howard Coster
1930s
NPG x93867

Kenneth David Kaunda
by Rex Coleman, for Baron Studios
15 June 1965
NPG x125661

Sophie Grigson
by Barry Marsden
6 November 1998
NPG P718(11)

David Perret
by Louise Bobbé
9 February 2001
NPG x88881

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