Protective clothing designed to protect against heat and flame can be exposed to direct contact with hot substances or hot surfaces. The diversity of such contact conditions makes it difficult to evaluate the hazards that can arise from high temperature. The test method described in this document allows this heat transfer to be assessed when a heating cylinder and the clothing material are brought into contact with each other. This standard forms part of a series of standards concerned with clothing designed to protect against heat and fire. This document specifies a test method for the determination of contact heat transmission. It is applicable to protective clothing (including hand protectors) and its constituent materials intended to protect against high contact temperatures. Application of this part of ISO 12127 is restricted to contact temperatures between 100 °C and 500 °C. Test institutes, certification bodies and manufacturers are potential users. This standard has been prepared by Technical Committee CEN/TC 162 "Protective clothing including hand and arm protection and lifejackets", the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 94 "Personal safety - Protective clothing and equipment". The responsible German standardization committee is Working Committee NA 075-05-02 AA "Schutzkleidung gegen Hitze und Feuer" ("Protective clothing against heat and fire") at the Personal Protective Equipment Standards Committee (NPS). This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 89/686/EEC Personal Protective Equipment (PPE).