Photographic element and process providing improved colour rendition.

摘要

The element comprises light-sensitive silver halide layers sensitised to green light and having differing degrees of light sensitivity, comprising in association with a higher sensitivity layer a yellow dye forming DIR coupler, and with the lower sensitivity layer a cyan dye forming DIR coupler. The yellow forming coupler releases a development inhibitor contg. a weak inhibitor fragment, and the cyan forming coupler has a timing gp. contg. a strong inhibitor fragment which releases a precursor of the development inhibitor fragment. An imaging process is also claimed. Pref., the DIR coupler which releases a development inhibitor contg. a weak inhibitor fragment is one of formula (1)-(5). The DIR coupler with timing gp. contg. a strong inhibitor fragment is one of formulae (6)-(10). The weak inhibitor is pref. benzotriazole or alkyl mercapto-tetrazole. The strong inhibitor is pref. phenylmercapto tetrazone and the DIR coupler contg. it pref. contains a quinone methide timing gp. The yellow dye forming DIR coupler is pref. an open chain keto methylene cpd. contained in the most sensitive green layer. The cyan dye forming coupler is a phenolic or naphtholic cpd. contained in the mid-green sensitive layer, the element pref. having at least 3 different green sensitive layers. Pref., a yellow coloured magenta dye forming masking coupler having one of formulae (MM1)-(MM8) is also contained in the green sensitive layer(s). Pref., the masking coupler in the layers is sufficient to provide a linear response of the element to green light across the sensitivity range of the layer.