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BS 2782-5.553A(1991) : 1991 AMD 10600

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

METHODS OF TESTING PLASTICS - OPTICAL AND COLOUR PROPERTIES, WEATHERING - DETERMINATION OF LIGHT ABSORPTION OF CELLULOSE ACETATE, BEFORE AND AFTER FURTHER HEATING
Superseded date

15-11-1999

Published date

23-11-2012

Publisher

British Standards Institution

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Renumbered and superseded by BS EN ISO 1600.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Superseded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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