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This International Standard - establishes a system of graphical symbols, intended for use in the marking of workwear articles and protective clothing providing information on the suitability for professional industrial laundering using ISO 15797, and - specifies the use of these symbols in qualifying garments as potentially suitable for industrial laundering. The following professional industrial laundering treatments are covered: washing, bleaching, tunnel finishing and tumble drying after washing. Textile-care treatments in dry and wet cleaning are covered in ISO 3175. This International Standard applies to articles of workwear and protective clothing in the form in which they are supplied to the professional launderer. It is a requirement of this International Standard that information on the performance of workwear and protective-clothing articles and their components with respect to cleaning treatments (ISO 15797) be obtained to allow selection of the appropriate labels. Only garments that can be successfully tested according to ISO 15797 need be labelled.