BS 2782-5.553A(1991) : 1991 AMD 10600
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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METHODS OF TESTING PLASTICS - OPTICAL AND COLOUR PROPERTIES, WEATHERING - DETERMINATION OF LIGHT ABSORPTION OF CELLULOSE ACETATE, BEFORE AND AFTER FURTHER HEATING
15-11-1999
23-11-2012
National foreword
Committees responsible
Method
1. Scope
2. Normative references
3. Principle
4. Reagents
5. Apparatus
6. Test sample
7. Procedure
8. Expression of results
9. Precision
10. Test report
Figure
1. Suitable mould
Provides a method for determining light absorption of cellulose acetate using test specimens from two mouldings using different periods of heating to give quantitative measurements compatible with visual judgements of yellowness, lightness and changes in these properties after moulding. Carried out on plasticized form cellulose acetate rather than in solution, since a more reliable guide is obtained to its performance in plastics materials. Minimizes the effects of haze or imperfections. Suitable for cellulose acetate having an acetic acid yield of 54% plus or minus 2.5% and may also be satisfactory for other transparent plastics which are not strongly coloured and can be moulded under the specified conditions. BS AMD 10600 RENUMBERS THIS STANDARD
| Committee |
PRM/21
|
| DevelopmentNote |
Renumbered and superseded by BS EN ISO 1600. (09/2005)
|
| DocumentType |
Standard
|
| PublisherName |
British Standards Institution
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| ISO 1600:1990 | Identical |
| BS 7825-3.5:1997 | Calibration of rubber and plastics test equipment. Calibration schedules Optical and weathering properties |
| ISO 565:1990 | Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal sizes of openings |
| ISO 585:1990 | Plastics Unplasticized cellulose acetate Determination of moisture content |
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