| 摘要 |
1,109,196. Developer concentrate. AGFAGEVAERT A.G. April 25, 1966 [May 3, 1965], No. 18037/66. Heading G2C. A developer concentrate, in which the inorganic constituents are potassium compounds, contains 20-80 g./1 of hydroquinone or an alkyl- or halidesubstituted hydroquinone, 300-600 g./1 of potassium compounds, and, per 100g, of potassium compounds, 10-20 g./1 of an aminoalkylcarboxylic, aminoalkyl sulphonic- or aminoalkylphosphoricacid. The acids may be ethylene diamine tetracetic acid, nitrile-triacetic acid, or diethylene triaminopentacetic acid. Other developing agents may also be included e.g. 1 -phenyl-pyrazolidone- (3), 4-aminopyrazolidone, 3-iminopyrazolidine and aminophenols. The example refers to a concentrate containing, K 2 S0 3 , KBr, K a CO s , KOH, hydroquinone, 1 -phenyl-pyrazolidone-(3) and ethylene diamine-tetracetic acid. |
