Steph Posted September 1, 2011 Report Share Posted September 1, 2011 (edited) From Henry Hellmer's batch book. Has both iron and copper, and then more copper in the brass. And lotsa zinc. From one of the "Carnelian Opal Glasses" pages: Copper Carnelians for Marbles Akro Agate Co. 12-1-25 H.T.H. OK. Sand: 1120 Soda: 410 Borax: 10 Red Iron Ox.: 45 Red Ox Cop.: 45 Limestone: 130 Brass Dust: 45 Zinc Ox.: 90 Formula page: http://i119.photobuc...odFormula_a.jpg (1600 x 1200) Edited September 1, 2011 by Steph Adding extra notation from the page Link to comment Share on other sites More sharing options...
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