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ISO 1598:1990
M00000851
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ISO 1598:1990 Plastics - Cellulose acetate - Determination of insoluble particles
standard by International Organization for Standardization, 09/01/1990
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Specifies a test method for determinig the number of insoluble and visible particles including all impurties and foreign particles in cellulose acetate. A test portion is dissolved in a mixture of dichloromethane, methanol and dimethylphthalate. Counting of all visible particles with a diameter greater than 0,15 mm in a square area with a side length of 25 mm.