Fixing Properties of Reaction Products Prepared by Thiocyanate and Salt of Carboxylic Acid
The reaction products of thiocyanate and salt of carboxylic acid were found to be useful as a rapid fixing agent of silver halide emulsion. The products were prepared by the reaction of thiocyanate salt and salt of aliphatic or aromatic carboxylic acid such as sodium hydrogen citrate, sodium hydroge...
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| Published in | Journal of The Society of Photographic Science and Technology of Japan Vol. 38; no. 1; pp. 37 - 40 |
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| Main Authors | , |
| Format | Journal Article |
| Language | Japanese |
| Published |
THE SOCIETY OF PHOTOGRAPHY AND IMAGING OF JAPAN
1975
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| Online Access | Get full text |
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| Abstract | The reaction products of thiocyanate and salt of carboxylic acid were found to be useful as a rapid fixing agent of silver halide emulsion. The products were prepared by the reaction of thiocyanate salt and salt of aliphatic or aromatic carboxylic acid such as sodium hydrogen citrate, sodium hydrogen succinate, and potassium hydrogen phthalate in the presence of acid or carbonate salt at a temperature in the neighborhood of 75°C for about 2.5 hours. The products were more stable to light and humidity than thiocyanate. The hygroscopicity of the products decreased by 10-20 percent as compared with that of thiocyanate salt. The fixing time with the products was shorter than that with thiosulfate salts. The clearing time was reduced in the order of nNH4SCN·NaC4H3O4, nNH4SCN·NaC4H5O6, nNH4SCN·NaC4H5O4, nNH4SCN·KC8H5O4, nNH4SCN·Na2C6H6O7. |
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| AbstractList | The reaction products of thiocyanate and salt of carboxylic acid were found to be useful as a rapid fixing agent of silver halide emulsion. The products were prepared by the reaction of thiocyanate salt and salt of aliphatic or aromatic carboxylic acid such as sodium hydrogen citrate, sodium hydrogen succinate, and potassium hydrogen phthalate in the presence of acid or carbonate salt at a temperature in the neighborhood of 75°C for about 2.5 hours. The products were more stable to light and humidity than thiocyanate. The hygroscopicity of the products decreased by 10-20 percent as compared with that of thiocyanate salt. The fixing time with the products was shorter than that with thiosulfate salts. The clearing time was reduced in the order of nNH4SCN·NaC4H3O4, nNH4SCN·NaC4H5O6, nNH4SCN·NaC4H5O4, nNH4SCN·KC8H5O4, nNH4SCN·Na2C6H6O7. |
| Author | HARADA, Kenji KAWASAKI, Masami |
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| Copyright | The Society of Photographic Science and Technology of Japan |
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| DOI | 10.11454/photogrst1964.38.37 |
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| EndPage | 40 |
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| References | 1) 川崎, 原田: 日本写真学会誌7,329 (1974 2) 特許出願特許願第86533号 (昭和48年 3) 特許出願特許願第99715号 (昭和48年 4) 特許出願特許願第99442号 (昭和48年 |
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| Snippet | The reaction products of thiocyanate and salt of carboxylic acid were found to be useful as a rapid fixing agent of silver halide emulsion. The products were... |
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| StartPage | 37 |
| Title | Fixing Properties of Reaction Products Prepared by Thiocyanate and Salt of Carboxylic Acid |
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