The composition of the development of a product having a stability still exposed to air improved

摘要

The present invention relates to a novel composition of the development of photographic products to the halides of silver having a stability to the air to be improved. & br / the composition comprises at least one oxidizable metal ion, ethylenediaminetetraacetic acid and at least one complexing agent of formula (i): & br / (see appended drawing in bopi) & br / in which & br / r * * * * r 1 and 2 are each independently an hydrogen atom, an alkyl group, substituted or not, of 1 to 10 carbon, a hydroxyl group, a hydroxyalkyl group, r * * 3 is a radical chosen from among - coom in which m is hydrogen or an ion against - such as lithium, sodium or potassium, - conhr 4r * * * * 5 in which r * * * * r 4 and 5 are each independently an hydrogen atom, an alkyl group, substituted or not of 1 to 10 carbon atoms and n, p and q are 1, 2 or 3. & br / this novel composition of the inorganic development is ecological and has a better resistance to oxidation by air.