Method for processing a color reversal photographic film

A method for processing an exposed color reversal photographic film comprising the steps of successively:

• (1) black and white developing the exposed film;
• (2) subjecting the film to a reversal procedure;
• (3) color developing;
• (4) bleaching;
• (5) fixing and (6) circulating this film after the fix in a final washing zone comprising at least one washing bath, wherein:
• the at least one washing bath of said final washing zone comprises a buffer, comprised of a weak acid and its conjugated base, with a conjugated base concentration more than or equal to 1 g/l, said buffer being capable to maintain the pH in the range of from 4.5 to 6 in said washing bath, and
• after having collected the contents of said washing bath, the said contents are passed through a nanofiltration device, comprising a membrane whose cut-off is more than the molar mass of the weak acid and the conjugated base making up the buffer, to give a permeate that is recycled in said final washing zone.