bbucky
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Post by bbucky on Apr 8, 2017 21:27:52 GMT -6
Has anyone done successful gold ruby firings?
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bbucky
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Post by bbucky on Apr 8, 2017 23:02:18 GMT -6
I should clarify my question. Are there any other people out there working with gold chloride as a colorant?
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gczop
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Post by gczop on Apr 9, 2017 10:12:49 GMT -6
I've been studying this question, haven't tried anything yet but will share a few thoughts.
1. Gold ruby glass and copper ruby glass are the same in that they both consist of discrete, correctly sized metal particles in a silica matrix.
2. Understand the basics, recommend Robert Tichane "Copper Red Glazes" 306 pages and Terence E. Warner "Synthesis, Properties and Mineralogy of Important Inorganic Materials Chap 17 "Gold Ruby Glass". Warner uses gold chloride, the result is lovely.
3. True copper red glazes are deemed quite challenging; gold red glaze may be possible but if I try expect to invest a lot of time for experimentation.
G
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Post by mohawkpiper on Apr 9, 2017 12:05:06 GMT -6
I dont remember where i got this impression, so i could be totally wrong, but i was under the impression that the chloride versions of things didnt work well with crystalline glazes because the high amounts of zinc interacting with it produced undesireable results? I think I heard it from a glaze chemist.... but again, not so sure.
I have never used gold anything, however my red crystal on white ground is based off of a copper oxblood glaze and fired with as close to a similar reduction cycle as i felt i could get. it has been very difficult for me to get good consistent results but when i do, the crystals are the rubiest reds of all the reds i have done. very unlike your normal post fire copper reduction. much nicer than using a stain.
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bbucky
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Post by bbucky on Jun 4, 2017 11:21:12 GMT -6
It's been awhile from you last post about red crystal. When you said you follow the reduction schedule closely to the ox blood glaze. what exactly does that mean? Are you reducing on the way up? At high temps?
Bill
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Post by mariscal on Jun 5, 2017 5:51:55 GMT -6
Hi copper bismuth reds 700ยบ celsius reduction   |
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gczop
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Post by gczop on Jun 5, 2017 8:20:48 GMT -6
Beautiful and innovative work with bismuth, Jose.
BTW Bernard Moore Master Potter pg 38 shows a "gold flambe'" piece (using gold chloride), which I'll diplomatically call unsuccessful.
G
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Post by mariscal on Jun 5, 2017 9:57:11 GMT -6
Thanks G , The combination of copper and bismuth give results gold but in the background Here another piece, I no have gold in the crystalls, I will keep trying  |
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fa
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Post by fa on Jun 7, 2017 9:00:55 GMT -6
I've gotten "Purple of Cassius" ruby red twice, out of many, many tries. The trick seems to be getting the purest gold you can, reducing it, and then strike-firing to about ^020 afterward. Mostly, though, I get really luscious yellows.
I used to get gold from a miner in the mountains, would call up and say, "Can you send me $50 worth of gold dust?" and I'd get a small plastic bag with enough to last years. Alas, he sold the mine for a huge profit....
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annie
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Post by annie on Jun 16, 2017 14:44:33 GMT -6
Jose,
These are stunning!! Well done!
All the best to you my friend,
-Annie
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Post by mariscal on Jun 19, 2017 4:26:19 GMT -6
Thanks Annie hugs from spain
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