90.60 Close of review Mar 4, 2024
ISO
ISO/TC 61/SC 9 Thermoplastic materials
International Standard
83.080.20 Thermoplastic materials
Published
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.
WITHDRAWN
ISO 1598:1975
PUBLISHED
ISO 1598:1990
90.60
Close of review
Mar 4, 2024