bleaching, paraffin

Значение термина bleaching, paraffin в knolik

bleaching, paraffin - Bleaching, Paraffin
bleaching, paraffin - The crude paraffin as filtered, and boiled for 2 hours with 5 per cent, of its weight of sodium sulphide and sufficient water. It is allowed to cool, so that the mass swimming on the top may become compact and be removed; it is then washed with river water, pressed, and afterwards dissolved in 20 per cent, amyl-alcohol, the paraffin being left as a pasty and pliable mass. It must remain for a time, and then be strongly pressed after filtering through bone-black. (De Molon.)

Рядом со словом bleaching, paraffin в knolik

bleaching, paper-pulpВ начало
буква ""
буквосочетание ""
bleaching, prints and printed books

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