1) A developer containing 0.05 M-Ti
3+-EDTA for the treatment of a negative film was investigated. To prepare this solution, 0.05 mol TiCl
3 and 0.075 mol EDTA·2Na·2H
2O are mixed per 1, 000 ml. Acetic acid and Na acetate are added to adjust pH 3.15. The color of the Ti
3+-EDTA developer is violet, while the oxidized solution turns non-colored. The photographic qualities of the negative processed with the Ti
3+-EDTA developer are a little inferior to D-76.
2) Although the redox potential of the Ti
3+-EDTA solution is nobler than the non-chelated Ti
3+ solution, the developing action of Ti
3+-EDTA solution is more vigorous than that of the non-chelated Ti
3+ solution. On the other hand, the potential of Fe
2+-EDTA solution is less noble than the Fe
2+ solution not etiolated, and the developing action of Fe
2+-EDTA is stronger than that of Fe
2+.
3) Ti3+-EDTA developer made by the method of electrolytic reduction of Ti
4+-EDTA solution can maintain its developing power repeating the development of films and the electrolytic reduction.
抄録全体を表示