Borax anti-devit side up versus side down
Posted: Sun Nov 18, 2012 7:59 pm
Some questions.
I sometimes use the borax/water/detergent recipe to control devitrification. I work almost exclusively with float and float-compatible stuff. I find that application of this mixture (and then firing to above about 760ºC) gives a nice 'flowiness' to the glass in addition to/as part of how it prevents devitrification.
I have been warned about and have occasionally experienced the sticking of kilnwash and thinfire to glass if I put the devit-treated stuff face down. However, I have received one report from someone who has claimed not to have this stickiness problem with borax-based devit wash.
My anti-devit wash is completely dry before being laid out on the shelf.
My questions:
1. Are there temperatures at which such treated glass won't stick to either kilnwash or thinfire paper?
2. Are there formulations of kilnwash (e.g. extra emphasis on alumina hydrate, as opposed to clay) which will discourage this tendency to stick?
3. Suppose I treat the top of some glass with this solution, and then in a separate firing flip the glass, is there a danger of glass sticking to either kilnwash or thinfire?
4. Are there formulations of the solution itself which can discourage such sticking?
Thanks for your insights.
I sometimes use the borax/water/detergent recipe to control devitrification. I work almost exclusively with float and float-compatible stuff. I find that application of this mixture (and then firing to above about 760ºC) gives a nice 'flowiness' to the glass in addition to/as part of how it prevents devitrification.
I have been warned about and have occasionally experienced the sticking of kilnwash and thinfire to glass if I put the devit-treated stuff face down. However, I have received one report from someone who has claimed not to have this stickiness problem with borax-based devit wash.
My anti-devit wash is completely dry before being laid out on the shelf.
My questions:
1. Are there temperatures at which such treated glass won't stick to either kilnwash or thinfire paper?
2. Are there formulations of kilnwash (e.g. extra emphasis on alumina hydrate, as opposed to clay) which will discourage this tendency to stick?
3. Suppose I treat the top of some glass with this solution, and then in a separate firing flip the glass, is there a danger of glass sticking to either kilnwash or thinfire?
4. Are there formulations of the solution itself which can discourage such sticking?
Thanks for your insights.
