BS ISO 18915:2000

Foreword
   Introduction
 1 Scope
 2 Normative references
 3 Terms and definitions
 4 Dichromate bleach test
 5 Hydrogen peroxide incubation test
   Annex A (informative) Numbering system
   for related International Standards
   Annex B (informative) Variable in silver
   stabilizing treatments
   Annex C (informative) Significance of
   the test methods
   Annex D (informative) Correction of
   density value
   Bibliography
   Figure 1 - Drawing of collar and baffles
   Figure 2 - Desiccator jar components
   Figure 3 - Assembled desiccator jar

This standard specifies the methods for evaluating the effectiveness of chemical conversion treatments intended to increase the resistance of wet-processed silver images to oxidation and the treatment may be applied as a part of the original processing or it may be post processing treatment

1.1 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 annexB.

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 annexC.

1.2 This International Standard is applicable to silver-gelatin images coated on supports of either plastic, paper or glass.