| 摘要 |
PURPOSE:To obtain the stable processing liquid which hardly generates tar, etc., by confining the processing time of the processing liquid having bleaching power within 30sec and incorporating a peroxide into the processing liquid having bleaching power. CONSTITUTION:The processing time of the processing liquid having bleaching power is within 30sec and the processing liquid having bleaching power contains the peroxide. Hydrogen peroxide, percarbonate, perborate and persulfate are preferably used as the peroxide. The salts thereof are exemplified by a potassium salt, sodium salt, ammonium salt, etc. The amt. of these peroxides to be used is in a 0.01-6.0mol/l range, more preferably 0.05-3.0mol/l range. The stable processing liquid which hardly generates the tar, etc., is obtd. in this way and the stain of the unexposed part is eliminated. |
