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International Standard Category: Photographic paper, films and plates. Cartridges

GB 6846-1986    Method for determining safety times of darkroom illumination
确定暗室照明安全时间的方法 ;
Category No.:37.040.20 Valid Status:superseded
Issued Organization:National Bureau of Standards Issued Date:1986-09-06
Implemented Date:1987-8-1 Abolished Date:
Superseded Standard.:GB/T 6846-2008 Photography - Determination of ISO safelight conditions
Superseded Date:2009-5-1
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