This standard specifies the loss on ignition of talc products, silicon dioxide, total iron, aluminum oxide, titanium dioxide, calcium oxide, magnesium oxide, potassium oxide, sodium oxide, hydrochloric acid insoluble matter, acid-soluble iron, acid-soluble calcium, manganese, Analysis methods for copper, acid-soluble, water-soluble content and their acidity and alkalinity, iron salts, arsenic, heavy metals, lead, etc. This standard applies to the composition analysis of natural talc and talc powder,