Coal — Methods for petrographic analysis — Part 2: Method of preparing coal samples
NORMA vydaná dňa 27.10.2025
Označenie normy: ISO 7404-2:2025-ed.3.0
Dátum vydania normy: 27.10.2025
Počet strán: 12
Približná hmotnosť: 36 g (0.08 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: This document specifies methods for preparing a polished particulate block from a sample of crushed coal for analysis by reflected light microscopy. These methods can also be applied to the preparation of a polished, embedded lump of coal.