Bone china glazing problems

Hey first post in this forum I try to use bone china since a month. They say everywhere, that I should high fire first. But of course if I do this the glaze does not stick afterwards. Is there any trick? Why should it be high fired first in general? Sadly, I do not find a lot of information about bone china. So far I only found one page websites. Does someone has a good website about bone china? Greetings from Estonia

By Ben10, March 27, 2022
37 replies

I'm using various recipes of my own creation, all closely based on the classic 25:50:25. Notably I'm in North America, so I've been testing subbing soda spars and various frits (mostly 3110) + silica to replace the cornish stone. For Kaolins I've been using NZK, Grolleg, and Standard Kaolin. I've used both TCP and bone ash, the real stuff burns whiter and fluxs much more in my experience. I worry that green is a red flag that I'm doing something wrong, but the ware is very well vitrified an