Photography. Determination of residual thiosulfate and other related chemicals in processed photographic materials. Methods using iodine-amylose, methylene blue and silver sulfide best-seller Their presence is confirmed by

Their presence is confirmed by the increase in volume conductivity of the liquid extract and the test is considered to have particular significance when applied to electrical insulating materials which are to be immersed in coolants or impregnates

This is a full revision of the standard to align it with BS 7121-1:2016 and address the causes of incidents that have occurred since the last edition was published

Protective earth current

7 Power input

Determination of ash yield by incineration

Photography. Determination of residual thiosulfate and other related chemicals in processed photographic materials. Methods using iodine-amylose, methylene blue and silver sulfide best-seller Their presence is confirmed by1 Scope 1. 1 This International Standard specifies test methods for the determination of residual thiosulfate and other related chemicals in processed photographic materials.