ISO standards free download ISO 247-1:2018 pdf download – Rubber – Determination of ash ISO 247-1:2018 pdf download - Rubber - Determination of ash 8.1 Method A Heat a clean empty crucible (6.1) of appropriate size for about 30 min in the muffle furnace (6.4), maintained at 550 °C ± 25... 03-01 Read More