| 摘要 |
According to this invention a developer has been disclosed having a low pH value between 9.6 and 11.0, preferably between 9.6 and 10.3, and comprising hydroquinone in an amount from 0 to less than 30 g per liter, an auxiliary developing agent, and as silver halide complexing agents alkali metal sulphite salts, preferably sodium salts, in an amount from 0 to less than 50 g per liter, more preferably to less than 40 g per liter, and thiocyanate salts in amounts from 0.1 to 3 g, more preferably from 0.5 to 2.5 g per liter, and at least 1 g of a compound corresponding to the formula (I), a precursor thereof, a derivative thereof and/or a metal salt thereofwhereineach of A, B and D independently represents an oxygen atom or NR1;X represents an oxygen atom, a sulphur atom, NR2; CR3R4; C=O; C=NR5 or C=S;Y represents an oxygen atom, a sulphur atom, NR'2; CR'3R'4; C=O; C=NR'5 or C=S;Z represents an oxygen atom, a sulphur atom, NR''2; CR''3R''4; C=O; C=NR''5 or C=S;n equals 0, 1 or 2;each of R1 to R5, R'1 to R'5 and R''1 to R''5, independently represents hydrogen, subsituted or unsubstituted alkyl, aralkyl, hydroxyalkyl, carboxyalkyl; substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted cycloalkenyl, substituted or unsubstituted aryl or substituted or unsubstituted heterocyclyl; and whereinR3 and R4, R'3 and R'4, R''3 and R''4, may further form together a ring; andwherein in the case that X=CR3R4 and Y=CR'3R'4, R3 and R'3 and/or R4 and R'4 may form a ring and wherein in the case that Y=CR'3R'4 and Z=CR''3R''4 with n=1 or 2, R'3 and R''3 and/or R'4 and R''4 may form a ring.
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