| 摘要 |
PURPOSE:To stabilize a processing liquid having bleaching power and to prevent edge contamination by incorporating the ferric complex salt of an org. acid specified in the mol.wt. of a free acid into the above-mentioned liquid. CONSTITUTION:The processing time by the processing liquid having the bleach ing power is within 30 seconds and the ferric complex salt of the org. acid having <280mol.wt. of the free acid is incorporated into the processing liquid having the bleaching power. An amino polycarboxylic acid compd. and polyphosphonic acid compd. are included as preferable examples in the free acid of <280mol.wt. in this ferric complex salt of the org. acid. Of these compds., the former is more preferably used. The stability of the liquid at the time of rapid processing is improved in this way and the edge contamination is decreased. |
