BS ISO 473:2019 pdf free.Lithopone pigments - General requirements and methods of testing. Weigh, to the nearest 0,1 mg, about 0,6 g of lithopone 30 %, or about 0,3 g of lithopone 60 %, or about 0,6 g of lithopone 20 %, all previously dried at (105 ± 2) °C, into a beaker and add 25 ml of the hydrochloric...