GB/T 39693.8-2022
Rubber,vulcanized or thermoplastic—Determination of hardness—Part 8:Apparent hardness of rubber-covered rollers by Pusey and Jones method (English Version)

Standard No.

GB/T 39693.8-2022

Language

Chinese, Available in English version

Release Date

2022

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB/T 39693.8-2022

Scope

This document describes a method for the determination of the apparent hardness [expressed as Cho (P&J) indentation value] of vulcanized rubber or thermoplastic rubber covered rolls. Zhao's (P&J) hardness tester is used to measure the indentation depth formed by the indenter pressing into the rubber surface under the rated pressure. The indentation value differs from that measured by the International [ ] rubber hardness method ISO 48 21 in which the rubber immediately adjacent to the indenter is pre-compressed. Zhao (

GB/T 39693.8-2022 Referenced Document

• ISO 18899:2013 Rubber - Guide to the calibration of test equipment

GB/T 39693.8-2022 history

• 2022 GB/T 39693.8-2022 Rubber,vulcanized or thermoplastic—Determination of hardness—Part 8:Apparent hardness of rubber-covered rollers by Pusey and Jones method

GB/T 39693.8-2022 -All Parts