30.99 Feb 2, 2026
ISO
ISO/TC 27/SC 5
Technical Specification
This document specifies a manual method for the determination of plastometric indices. These indices are the maximum thickness of the plastic layer (Y, mm) and the final contraction value (X, mm).
This document is applicable for hard coals with a determined ash level less than 15 % on a dry basis, as described in ISO 11722 and ISO 1171.
PUBLISHED
ISO/TS 4699:2022
IN_DEVELOPMENT
ISO/CD TS 4699
30.99
CD approved for registration as DIS
Feb 2, 2026