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Overview ISO 7404-2:2025 - "Coal - Methods for petrographic analysis - Part 2: Method of preparing coal samples" specifies standardized methods for preparing a polished particulate block (or a polish…
Overview ISO 7404-2:2009 - Methods for the petrographic analysis of coals - Part 2: Methods of preparing coal samples defines standardized procedures for preparing polished particulate blocks (and em…
1 Scope This part of ISO 7404 specifies methods for preparing a polished particulate block from a sample of crushed coal for analysis by reflectance microscopy. These methods can also be applied to t…