GB/T 12938-1991Determination of thiosulphate and other residual chemicals in processed photographic materials. Iodine-amylose, methylene blue and silver sulphide densitometric methods (English PDF)
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Issued by
State Bureau of Technical Supervision
Level / Type
National · Recommended
Issue date
May 22, 1991
Implementation date
May 1, 1992
Scope
GB/T 12938-1991 (Determination of thiosulphate and other residual chemicals in processed photographic materials. Iodine-amylose, methylene blue and silver sulphide densitometric methods) is available as an English-translated PDF.
GB/T 12938-1991 — This standard specifies the processed photographic materials and their decomposition products of residual thiosulfate total of three methods of measurement.
Thiosulfate determination of sensitivity greater than 0. 1��g/cm ^ 2, three methods of determination of scope refer to Appendix B. This standard applies to the use of thiosulfate in the process of fusing and after the last wash treated gelatin silver halide photosensitive material.
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Document preview — GB/T 12938-1991
National Standard of the People's Republic of China
- ICS
- 37.040.30
- Classification
- A 15
Issued by: State Bureau of Technical Supervision
Contents
- What this standard covers1
- Document data2
- Standards quoted by this document3
What this standard covers
This standard specifies the processed photographic materials and their decomposition products of residual thiosulfate total of three methods of measurement. Thiosulfate determination of sensitivity greater than 0. 1�g/cm ^ 2, three methods of determination of scope refer to Appendix B. This standard applies to the use of thiosulfate in the process of fusing and after the last wash treated gelatin silver halide photosensitive material. This standard does not apply to the stability has not been taken to deal with the fixing of black and white products.
Document data
International classification (ICS): 37.040.30.
Chinese classification (CCS): A15.
Estimated length of the Chinese original: 16,159 words.
Adopted international standard: ISO 417-1977, NEQ.
Standards quoted by this document
GB 9049
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 11 pages — is available in the English PDF.
Referenced standards
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