This document 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 (all parts). This document applies to articles of workwear and protective clothing in the form in which they are supplied to the professional launderer.