1 This International Standard describes methods for evaluating the effectiveness of chemical conversion treatments intended to increase the resistance of wet-processed silver images to oxidation. The treatment may be applied as part of the original processing, or it may be a post-processing treatment. This International Standard does not recommend general or specific treatments for silver images. Likewise, treatment temperature, times and replenishment rates are outside the scope of this International Standard. Factors to be considered in a stabilizing treatment are discussed in informative annex B. Two test methods are described: the "dichromate bleach test" and the "hydrogen peroxide incubation test" (see [7] in the bibliography). The significance of each is discussed in informative annex C. 2 This International Standard is applicable to silver-gelatin images coated on supports of either plastic, paper or glass.
BS ISO 18915:2001 history
2001BS ISO 18915:2001 Imaging materials - Methods for the evaluation of the effectiveness of chemical conversion of silver images against oxidation
2001BS ISO 18915:2000 Imaging materials. Methods for the evaluation of the effectiveness of chemical conversion of silver images against oxidation