Historical
ISO 1265:1979
Plastics - Polyvinyl chloride resins - Determination of number of impurities and foreign particles
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.
CONTENT PROVIDER
International Organization for Standardization [iso]
International Organization for Standardization [iso]