Deleted
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Post by Deleted on Dec 2, 2016 11:27:25 GMT -6
I do too, Annie, it's just the scientist/lab tech in me that gets uneasy with unknown variables. I suppose if that were my dominant trait, working with crystal glazes is the wrong place for me. But I stickin'.
I did exactly that, I stuck it in a container of white vinegar (slightly diluted, since I didn't have enough to quite bring it to the top), and have left it for (so far) about 36-hours. Don't know for sure if it's done anything yet because the water's refractory index tends to change the way the crystals look when wet. I'll be taking it out sometime today and checking it dried.
This is an edit after a few hours, and I've taken the piece out of the vinegar, and the results were not a spectacular change, but definitely pleasing.
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Post by Deleted on Dec 2, 2016 14:20:30 GMT -6
If I fire the acid-treated vase to, say, cone 08, to fire off the gold, would that potentially wipe out the changes made by the acid?
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annie
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Post by annie on Dec 14, 2016 5:36:26 GMT -6
Gabriel, Don't know the answer to that. Maybe Greg, Arne, Holly, Kuba, Jim or Koz do. (Or another equally experienced.)
By the by, we're all a bit scientific on this forum, in one way or another and often in our day-jobs (current or past). And the variables are so huge in this passion. Just be sure to document your process and you're almost assured of advancement. Everyone probably needs to see for themselves the puke yellow-green you get with too much titanium with nickel!
By the way, if you haven't already, check out the images online of changing the colour of titantium with just temperature; might shed some light....
Wishing you tons of success, --Annie
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Post by jfox on Dec 14, 2016 20:22:41 GMT -6
I have no idea but id like to see the results
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Post by Deleted on Dec 14, 2016 22:45:57 GMT -6
Something interesting happened when I soaked a vase in vinegar. I didn't fully submerge it to see if I could tell the difference between the treated and untreated surfaces. Then I applied some gold, fired it to 018, and the result was that only the part the vinegar did not touch turned satin or matte. The acid-soaked part remained perfectly glossy.
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annie
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Post by annie on Dec 15, 2016 3:32:50 GMT -6
Cool Gabriel. Love to see a pic.
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Post by Deleted on Dec 15, 2016 10:42:22 GMT -6
I thought about posting a pic, but the demarcation between the glossy and matte is so subtle you couldn't discern it in a photograph. But I could try.
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Post by Mark Winner on Sept 7, 2018 16:03:09 GMT -6
I have a firing cycle I do where after crystals are grown I drop the temp to 1000f then rais it to 1600f and hold for 1hour and get the same results. It’s almost like a carbon covering. I then give the vases an asid bath of vinagar 80% and ammonia 20%. Brightening it righ up. The glaze can be a standard 3110 or 413 with 2% copper. Also add from 0% to 3% red iron oxide. The purpose of this last cycle is for the strike fire in one firing and it also grows a last white ring to make the crystals stand out.
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