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BS ISO 18929:2012

BS ISO 18929:2012

$167.15

Imaging materials. Wet-processed silver-gelatin type black-and-white photographic reflection prints. Specifications for dark storage

Published By Publication Date Number of Pages
BSI 2012 34
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This International Standard establishes the specifications for silver-gelatin photographic reflection prints intended for dark storage. It covers silver-gelatin print types of all weights.

This International Standard applies to wet-processed black-and-white silver-gelatin photographic prints, including those that have been chemically treated (with a gold, selenium, sulfur, or other chemical treatment bath) to improve the permanence of the silver image. It also applies to silver-gelatin prints processed by a monobath, which includes thiosulfate as a fixing agent followed by a conventional wash.

This International Standard is not applicable to instant black-and-white photographic prints, stabilization-processed black-and-white prints (those where the undeveloped silver halide has been chemically converted and not removed), or thermally processed black-and-white prints. It does not apply to colour or dye-based photographic prints, nor to prints that have been processed by a monobath using other than a thiosulfate-type fixing solution, or prints where the silver salts are rendered more soluble by means other than thiosulfate.

Laminated and adhesive mounted reflection prints, prints on poly (ethylene terephthalate) support, and prints that have been displayed are also excluded from this International Standard.

PDF Catalog

PDF Pages PDF Title
3 CVP_Secretariat_Loca
6 Foreword
7 Introduction
9 SameLvl
1 Scope
2 Normative references
3 Terms and definitions
10 4 Safety and operational precautions
4.1 Hazard warnings
4.2 Hazard information code system
11 4.3 Safety precautions
5 Requirements for physical stability of prints
5.1 Wedge brittleness
5.2 Tensile energy absorption (see Annex C)
5.3 Resin cracking of RC papers (see Annex D)
6 Requirements for processed image stability (see Annex E)
6.1 Residual thiosulfate concentration
12 6.2 Residual silver concentration
6.3 Yellowing limit (see Annex G)
7 LE designation
8 Test methods
8.1 Wedge brittleness
13 8.2 Tensile energy absorption
14 8.3 Yellowing
8.4 Residual silver compound test using cyanogen iodide (CNI) extraction
15 8.5 Residual silver compound test by use of sulfuric acid/nitric acid extraction
16 8.6 Resin cracking
19 Annex A
(informative)

Stabilization treatments to prevent silver oxidation

20 Annex B
(informative)

Potential silver-image discolouration of RC prints under display conditions

21 Annex C
(informative)

Tensile energy absorption

22 Annex D
(informative)

Environmental resin-cracking

23 Annex E
(informative)

Effects of residual thiosulfate and silver in processed prints

25 Annex F
(informative)

Degradation of silver images due to extraneous oxidation

26 Annex G
(informative)

Discolouration of black-and-white photographic prints
Annex G
(informative)

Discolouration of black-and-white photographic prints

28 Annex H
(informative)

Densitometric versus spectrophotometric measurement of yellowing
Annex H
(informative)

Densitometric versus spectrophotometric measurement of yellowing

29 Bibliography
Bibliography

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BS ISO 18929:2012
$167.15