Specification of a visual method of determining the number of impurities and foreign particles in polyvinylchloride resin. About 200 g of resin are flattened between a rigid white plate and a glass sheet containing a grid. The impurities and foreign particles visible in 25 squares (= 225 cm ) and having a diameter equal or greater than 0,250 mm are counted. Expression of the result by extrapolation as the number of specks per 100 squares of the grid.

General information

  • Status :  Withdrawn
    Publication date : 1979-07
  • Edition : 1
    Number of pages : 3
  • :
    ISO/TC 61/SC 9
    Thermoplastic materials
  • 83.080.20
    Thermoplastic materials

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