GB/T 12938-1991 English PDF

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GB/T 12938-1991: Determination of thiosulphate and other residual chemicals in processed photographic materials. Iodine-amylose, methylene blue and silver sulphide densitometric methods

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12938-1991	559	Add to Cart	3 days	Determination of thiosulphate and other residual chemicals in processed photographic materials. Iodine-amylose, methylene blue and silver sulphide densitometric methods

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Basic data

Standard ID: GB/T 12938-1991 (GB/T12938-1991)
Description (Translated English): Determination of thiosulphate and other residual chemicals in processed photographic materials. Iodine-amylose, methylene blue and silver sulphide densitometric methods
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A15
Classification of International Standard: 37.040.30
Word Count Estimation: 16,163
Date of Issue: 5/22/1991
Date of Implementation: 5/1/1992
Quoted Standard: GB 9049
Adopted Standard: ISO 417-1977, NEQ
Issuing agency(ies): State Bureau of Technical Supervision
Summary: 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.

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