21. Photography. Processing chemicals. Specification for anhydrous sodium thiosulfate and sodium thiosulfate pentahydrate. (15th March 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
22. Photography. Processing chemicals. Specifications for aluminium potassium sulfate. (15th August 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
23. Reagents for chemical analysis. Specifications (first series) Part 2, (31st August 1984) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (66 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
24. Reagents for chemical analysis. Specifications (second series) Part 3, (30th March 1990) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (110 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
25. Rubber compounding ingredients. Precipitated silica. Determination of aggregate size distribution by disc centrifuge. (8th November 2019) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
26. Rubber compounding ingredients: precipitated, hydrated silica. Method for determination of physical properties in rubber (including test recipe) Part 2, (31st January 1984) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
27. Specification for disodium tetraborates, technical grades. (30th June 1980) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (4 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
28. Specification for photographic grade aluminium potassium sulphate, dodecahydrate (potash alum). (28th April 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
29. Specification for photographic grade sodium carbonate, monohydrate. (28th April 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
30. Specification for photographic grade sodium tetraborate, decahydrate (borax). (28th April 1978) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗