Sold x 115 grm (1/4 lb) Glass Alchemy Black Pearl Borosilicate Glass Rods. After conducting a workshop on metal lusters and surface work, a student asked why there were no black luster colors.  What a brilliant idea.   Inspired by this conversation, we started playing with various formulas that would have the following characteristics: be black, opaque, difficult to muddy, easy to luster, demonstrate non-metallic striking effects! After extensive testing of several formulas, Black Pearl, 9789 was introduced as a Revolution 33 color and was an immediate hit. Size: 7mm x 58cm length. Weight per rod approx. 32 grms. 3-4 rods per  115grms or 12 - 15 rods per 458 grms (1lb). 

Working Tip: 

Flame or kiln strike at 1075°F.  Work neutral; reduce at end for metallic effects.