Cupellation - from cupel to SILVER bead
59.2 هزار بار بازدید -
6 سال پیش
-
DIY fire assay - refining
DIY fire assay - refining without acids
Silver cupellation - the full process. Cupel is made from dry portland cement . Silver contacts are then smelted with lead and refined employing the cupellation process. The lead in the form of litharge and the others base metals oxides are absorbed by the cupel, leaving the pure silver button behind.
#cupel #silver #owltech #preciousmetals
Silver cupellation - the full process. Cupel is made from dry portland cement . Silver contacts are then smelted with lead and refined employing the cupellation process. The lead in the form of litharge and the others base metals oxides are absorbed by the cupel, leaving the pure silver button behind.
#cupel #silver #owltech #preciousmetals
6 سال پیش
در تاریخ 1397/06/08 منتشر شده
است.
59,279
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