the orange mask

LITColour negative film records each colour as its complement: cyan, magenta and yellow dyes stand in for red, green and blue. Real cyan and magenta dyes also absorb some blue and green they should not, so colour negative film carries coloured couplers that leave a compensating orange cast over the whole negative, the "orange mask". The print filtration then cancels it. (Introduced by Kodak around 1949, a date from memory, unverified.)

MODELThe film base absorbs a little blue-green (my shapes), so seen against the light it is orange. Toggle the mask and compare the base and the negative patches. Nesting: an orange-masked negative between the scene and the print, in the void.

mask

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