GB/T 12938-1991
Determination of thiosulphate and other residual chemicals in processed photographic materials--Iodine-amylose, methylene blue and silver sulphide densitometric methods (English Version)
- Standard No.
- GB/T 12938-1991
- Language
- Chinese, Available in English version
- Release Date
- 1991
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 12938-1991
- Scope
- This standard specifies three methods for the determination of the total amount of residual thiosulfate and its decomposition products in processed photographic materials. The determination sensitivity of thiosulfate content is greater than 0.1 μg/cm2, and the determination range of the three methods refers to Appendix B. This standard applies to gelatin silver halide photosensitive materials that are fixed with thiosulfate during processing and are finally washed with water. This standard does not apply to black-and-white products that have not been stabilized by fixing.
GB/T 12938-1991 history
- 1991 GB/T 12938-1991 Determination of thiosulphate and other residual chemicals in processed photographic materials--Iodine-amylose, methylene blue and silver sulphide densitometric methods
