BS ISO 18917:1999
Current
The latest, up-to-date edition.
Photography. Determination of residual thiosulfate and other related chemicals in processed photographic materials. Methods using iodine-amylose, methylene blue and silver sulfide
Hardcopy , PDF
English
15-04-2000
Important note : Users cannot be edited or removed once added to your Multi user PDF.
1 Scope
2 Normative references
3 General requirements
4 Iodine-amylose method
5 Methylene blue method
6 Silver densitometric method
Annex A (informative) Appraisal of keeping characteristics
Annex B (informative) Guidance in the selection of test method
Annex C (informative) Preparation for 0,2 mol/l sodium
hydroxide solution
Annex D (informative) Preparation of 1,000 mol/l sodium
thiosulfate solution
Bibliography
Defines test procedures for determining residual thiosulfate and other related chemicals in processed photographic materials.
| Committee |
CPW/42
|
| DevelopmentNote |
Supersedes BS ISO 417. (03/2000) Supersedes 97/712494 DC. (07/2005) Reviewed and confirmed by BSI, August 2016. (07/2016)
|
| DocumentType |
Standard
|
| Pages |
28
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
1.1 This International Standard specifies test methods for the determination of residual thiosulfate and other related chemicals in processed photographic materials.
1.2 This International Standard applies to silver halide/gelatin products that have been processed with a final thiosulfate fixing bath and a water wash. This International Standard does not apply to stabilised black-and-white products, thermally processed films, or instant-type products. The procedures given in this International Standard measure residual thiosulfate, and the silver densitometric method measures residual related polythionate materials as well. Measurements carried out by the procedures in this International Standard may, within the limitations stated in annexes A and B, correlate with the image stabilities of processed photographs.
1.3 Film or plates with photographic-sensitive layers on both sides, or with a photographic sensitive layer on one side and a gelatin backing layer on the reverse side, may contain approximately twice as much thiosulfate after processing as samples having a coating on one side only. This situation will be true for materials for which residual thiosulfate is determined by the iodine-amylose or methylene blue procedures.
NOTE For the method of reporting such results, see figure 1, example 2.
1.4 The iodine-amylose can be used with fibre-based paper, resin-coated paper, films and plates. It is the method to be used with films and papers containing incorporated developing agents.
1.5 The methylene blue method can be used with fibre-based paper, resin-coated paper, films and plates but not with films and paper containing incorporated developing agents.
1.6 The silver sulfide densitometric method measures thiosulfates, polythionates and all other residual chemicals in a processed product that react with silver ion to form a silver \'stain\' under the conditions of the test.
1.7 A tabulated summary of methods, scope, etc. is given in annex B.
| Standards | Relationship |
| ISO 18917:1999 | Identical |
| BS 6313:2003 | Micrographics. 35 mm microfilming of serials. Specification |
| BS 0-3:1997 | A standard for standards Specification for structure, drafting and presentation |
| ISO 835-4:1981 | Laboratory glassware Graduated pipettes Part 4: Blow-out pipettes |
| ISO 6051:1997 | Photography Processed reflection prints Storage practices |
| ISO 3897:1997 | Photography Processed photographic plates Storage practices |
| ISO 6353-1:1982 | Reagents for chemical analysis — Part 1: General test methods |
| ISO 5466:1996 | Photography — Processed safety photographic films — Storage practices |
| ISO 1042:1998 | Laboratory glassware — One-mark volumetric flasks |
| ISO 10602:1995 | Photography — Processed silver-gelatin type black-and-white film — Specifications for stability |
| ISO 648:2008 | Laboratory glassware — Single-volume pipettes |
| ISO 4788:2005 | Laboratory glassware — Graduated measuring cylinders |
| ISO 835-2:1981 | Laboratory glassware Graduated pipettes Part 2: Pipettes for which no waiting time is specified |
| ISO 10349-1:2002 | Photography Photographic-grade chemicals Test methods Part 1: General |
| ISO 385-1:1984 | Laboratory glassware — Burettes — Part 1: General requirements |
| ISO 835-3:1981 | Laboratory glassware Graduated pipettes Part 3: Pipettes for which a waiting time of 15 s is specified |
| ISO 6353-3:1987 | Reagents for chemical analysis — Part 3: Specifications — Second series |
| ISO 5-3:2009 | Photography and graphic technology Density measurements Part 3: Spectral conditions |
| ISO 835-1:1981 | Laboratory glassware Graduated pipettes Part 1: General requirements |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.