This part of ISO 7267 specifies a method for the determination of the apparent hardness of vulcanized or thermoplastic rubber roller covers, expressed in International Rubber Hardness Degrees (IRHD). The method is similar in principle to the methods used for the determination of the hardness of rubber in ISO 48, in that it consists essentially of measuring the depth of penetration of a spherical indentor operating under a specified force. The apparatus used is similar to that described in ISO 48, having a base specifically designed for application to roller covers and similar curved surfaces.
BS 7442-3.1:1998 history
2018BS ISO 48-6:2018 Rubber, vulcanized or thermoplastic. Determination of hardness. Apparent hardness of rubber-covered rollers by IRHD method
2017BS ISO 7267-1:2017 Rubber-covered rollers. Determination of apparent hardness. IRHD method
2009BS ISO 7267-1:2008 Rubber-covered rollers - Determination of apparent hardness - IRHD method
1998BS 7442-3.1:1998 Rubber or plastics covered rollers - Method of test - Determination of apparent hardness (IRHD method)