GB/T 12825-2003 in English

《GB/T 12825-2003高聚物多孔弹性材料 凹入度法硬度测定》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC7（全国橡胶与橡胶制品标准化技术委员会橡胶杂品分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了三种测定多孔弹性材料的凹入硬度的方法：方法A：（凹入硬度指数）：给出一种单一的试验室试验的凹入度测定方法。方法B：（凹入硬度特性）：提供硬度凹入曲线形状的资料。方法C：（凹入硬度检验）：一种适合于质量控制试验的快速方法。

Scope

This standard specifies three methods for determining the indentation hardness of poroelastic materials: Method A (indentation hardness index): A single laboratory test method for the determination of indentation is given. Method B (Concave Hardness Profile): Provides information on the shape of the hardness concave curve. Method C (Indentation Hardness Test): A rapid method suitable for quality control testing. This standard applies to open-cell latex, polyurethane sponge and polyvinyl chloride sponge. The results obtained by these methods relate only to specific test conditions and are usually not directly usable for design purposes.