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Post by hollymckeen on Oct 1, 2015 15:46:50 GMT -6
What a mountain of info and testing. Well done, all! Some very interesting results.
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Post by tileman2 on Oct 7, 2015 19:38:12 GMT -6
Going to change testing protocol. I have been firing test tiles with one colorant only, to test the reaction of individual colorants to caustic alkalinity etching. In addition, each tile will be partly submerged so the changes can be viewed on one piece instead of several. The test tile below is 4% MNO, soaked for 72 hours in 13.85 PH potassium hydroxide. The strike fire results will be posted once all the colorants have been tested; and this post edited to include those results. The blue line indicates the portion subjected to etching; the area above was not been subjected to any etching. It is noted however that the area immediately above the soak line did absorb some potassium and changed colors. The crystals submerged changed to a mauve color. Note: A 3% Cobalt oxide piece was subjected to the same test protocol with 0% change. Currently a 4% Cu Carb piece is being soaked. Tom
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Post by John Garrison on Sept 13, 2016 9:11:51 GMT -6
I assess this would be a reasonable tread to post this question. Has anyone attempted etching with Acetic Acid, ACS? I have not been able to find nor have read any testing of this so far. I am planning on experimenting with this within the next week or so but was curious if anyone has stroled down that rabbit path.. before I take the red pill. Any advice or experience with this acid would greatly assist my test.
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Post by adammacmillan on Sept 13, 2016 11:56:30 GMT -6
I have been testing some copper pieces with glacial acetic acid. So far, i have not created anything interesting using a 3110 base and up to 24 hours of etching. I will have some other frit based tests coming soon.
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