Digitalfire is facing a takedown order from Plainsman Clays. They are revoking permission to "use any Plainsman content" "on any platform". This is broad and vague enough, and this site large enough, that I am unable to comply or even interpret it in the short timeframe (June 27). Please don't panic, I am overwhelmed by the unbelievable support I am getting. We just need to get them to relent on this demand and call off the lawyer (to at least permit commentary). I would reconcile in a minute if it was possible.
People are panicking downloading/scraping again, overloading the server. I have to shut these pages down for a few hours.
Insight-live.com general operation is not affected by any of this.
If you are interested in the most functional possible surface, consider a 2% zircon addition to your transparent glaze recipe (the outside glaze on these mugs is a copper blue, but that is not the one we are interested in). The clear glaze on the insides of these two identical cone 6 porcelain mugs has 3% and 2% zircon added. It is not being added to opacify, it is being added to toughen the surface and reduce the thermal expansion. The presence of the 2% zircon has not affected the gloss or transparency of the glaze on the right. However, the 3% on the left has opacified it just slightly and made the surface a little silky. So that is too much for this glaze (although it might be OK if the melt fluidity was higher).
| Materials |
Zircon
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| Materials |
Zircopax
Zirconium silicate, its principle use in ceramics is as an opacifier in glazes. It is an expensive material, but less so than tin oxide. |
| Glossary |
Glaze Durability
Ceramic glazes vary widely in their resistance to wear and leaching by acids and bases. The principle factors that determine durability are the glaze chemistry and firing temperature. |
| Recipes |
G2926B - Cone 6 Whiteware/Porcelain transparent glaze
A base transparent glaze recipe created by Tony Hansen, it fires high gloss and ultra clear with low melt mobility. |
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