FIELD: art-photography technology. SUBSTANCE: photographic material is processing by oxidizable solution to obtain higher contrast factor of pattern. Solution has next components in units of g per l: potassium ferrohexacyanide 100-250, caustic sodium 40-100, triazobenzene 0,1-0,4 and water added up to 1 l. Reducing solution for next treatment has bivalent iron sulfate, oxalic acid, sodium citrate, Trilon B and water. EFFECT: better method for polychromatic pattern making. 1 tb
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