21. Methods of test for paints. Optical tests on paint films. Determination of contrast ratio (opacity) of light-coloured paints at a fixed spreading rate, using polyester film Part D6, (30th November 1982) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
22. Methods for determining optical properties of pulp, paper and board. Measurement of diffuse blue reflectance factor (ISO brightness) of pulps Part 4, (31st March 1980) 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. Methods for determining optical properties of pulp, paper and board. Measurement of diffuse blue reflectance factor (ISO brightness) of paper and board Part 2, (30th June 1980) 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) ↗
24. Methods for determining optical properties of pulp, paper and board. Determination of opacity (paper backing) of paper and board by the diffuse reflectance method Part 3, (30th June 1980) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
25. Methods of test for anodic oxidation coatings on aluminium and its alloys. Measurement of total reflectance using a photoelectric reflectometer Part 11, (29th November 1985) 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) ↗
26. Photographic density measurements. Specification for geometric conditions for reflection density Part 4, (28th June 1985) 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) ↗
27. Photographic density measurements. Guide for terms, symbols and notations Part 1, (28th June 1985) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
28. Methods of test for paints. Optical tests on paint films. Determination of colour and colour difference: measurement Part D9, (31st October 1986) 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. Methods of testing plastics. Optical and colour properties, weathering. Determination of specular gloss Part 5, (28th February 1992) 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) ↗
30. Photography. Density measurements. Spectral conditions Part 3, (15th February 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (28 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗