scope:

Section one of this International Standard specifies a method for the determination of the "free" length of a roll of plastics film or sheeting. This methods is intended for use with rolls of length up to 100 m as a reference method with which other methods may be checked. Any other method of determining the length may be used, provided that it gives the same results as the specified method. If automatic measuring devices are used, they shall be checked by measurements made by the specified procedure for each type of plastics film and sheeting. Because the method is laborious it is permissible, in the case of long rolls, to check the other methods of measurement referred to above on an approximately 100 m length of film and sheeting measured by the specified method. Section two of this International Standard specifies a method for the determination of the average width of a roll and the width of a sample of plastics film or sheeting not less than 5 mm wide. If the width is only sligthly greater than 5 mm, the accuracy of the method is only 2 %. Two procedures are specified, their application depending on the material width. The method determines the "free" width of a roll of film or sheeting.