scope:

This International Standard specifies several methods for preparing laboratory samples of fibres, and presents a limited treatment of the problem of drawing specimens for testing. It is not possible for the coverage of each individual procedure to be fully comprehensive; in many instances the selection of test samples or test specimens must necessarily be covered by the appropriate method of test. An annex and tables are given in this International Standard for general guidance in determining the size of the test sample to be taken in order that the determined sample mean shall have given confidence limits.