1.1 This standard specifies a method for the determination of the indentation hardness of plastics and ebonite by means of durometers of two types: type A is used for softer materials and type D for harder materials (see the Note to 8.2). The method permits measurement either of the initial indentation or of the indentation after a specified period of time, or both.
Note: The durometers and the methods specified in this standard are referred to as type A Shore and type D Shore durometers and durometer methods, respectively.
1.2 This method is an empirical method intended primarily for quality control purposes. No simple relationship exists between indentation hardness determined by this method and any fundamental property of the material tested. For specification purposes, it is recommended that GB/T 6031-1998, Rubber, Vulcanized or Thermoplastic - Determination of Hardness (Hardness between 10 IRHD and 100 IRHD), be used for the softer materials.
2 Normative Reference
The following normative document contains provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions of, this publication do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 2918-1998 Plastics - Standard atmospheres for Conditioning and Testing (idt ISO 291: 1997)
