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Reactive glass firing and devit
Posted: Tue Oct 14, 2003 10:35 pm
by Ron Coleman
I'm working on a piece that has a lot of BE French Vanilla. I didn't use any devit spray because I figured it would kill the reactive quality of the glass. After three firings the French Vanilla has a very matt finish and lost most of the warm color and is mostly a flat off-white. Before the next firing with some reactive decorations I'm going to sandblast the surface and hopefully remove all the devit.
The big question, will the warm color of the French Vanilla return after blasting?
Ron
Posted: Wed Oct 15, 2003 1:29 am
by Lynne Chappell
Never done this, but I think you may find that the color change is only on the top surface. I know that a little bit of silver will warm it up some.
Re: Reactive glass firing and devit
Posted: Wed Oct 15, 2003 4:27 am
by Brian and Jenny Blanthorn
Ron Coleman wrote:I'm working on a piece that has a lot of BE French Vanilla. I didn't use any devit spray because I figured it would kill the reactive quality of the glass. After three firings the French Vanilla has a very matt finish and lost most of the warm color and is mostly a flat off-white. Before the next firing with some reactive decorations I'm going to sandblast the surface and hopefully remove all the devit.
The big question, will the warm color of the French Vanilla return after blasting?
Ron
Some of these glasses R micro cristaline or got some form of solid in em
B that bubles or metals or sand type stuff
These can devitrify thougout the glass as the glass is full of neucleation points
Then again could B a surface thing
I cant C U got a lot 2 loose by sandblasting
How U multi coloured glass types get on 4 consistancy I dont know
I only realy got 3 or so variabbles over the last 20 years or so n I still get problems with weird ness
Brian
Posted: Wed Oct 15, 2003 1:03 pm
by gone
Hi Ron,
It seems that the creamy transparent is on the surface and the center is eggshell white. The newer stuff tends to be whiter than even last years. What has worked for me is to sprinkle a small amount of 1437 light amber powder on the surface. It reacts to the same colors as the french vanilla.
Els
Posted: Wed Oct 15, 2003 1:27 pm
by Barbara Muth
I find that making the vanilla sheet from frit builds in the color gradations. So you may be able to get some of the creamy color range back by furing fine vanilla frit on top. Have never blasted vanilla and fired again so i don't know if you can get it back, but when I slice the vanilla (frit glass) the color is all even on the inside.
Barbara