So I've done a couple of quick glaze tests based on some recipes that were given or which I've pinched from elsewhere. Simple stuff really.
The first is a clear glaze, 80% Lead Bisilicate (LBS) and 20% Hyplas ball clay. It has a nice creamy colour to it - no crackling that I can see, despite already being filled with hot water. There are a lot of bubbles in it - I added an extra-thick pour to the patterned areas. I like the bubbles but I'm not sure if it's a hazard or not. In the foot ring, there are more bubbles - a bit rougher but it's ok. I like.
The second one is 80% LBS, 10% FFF feldspar, 10% Hyplas. I've also added some cobalt to the previous glaze - just a smidgen - and splashed some on the top, to see what it's like. As you can see, I didn't mix the cobalt in very well - I didn't sieve it.
Again, I like. Many more bubbles, good colour, nice where thick.
Well, I'm not sure you'll be able to see it in the next picture, but... it's coming away from the rims. Well, it isn't, but it looks like it is. There are lines and I'm not sure if it's cracking in the glaze where it's starting to shimmer off, or just marks in the underlying slip. I'm assuming the former, because the others look ok to me. Shame. This is, I think, Paul Young's recipe, there abouts - different clays and feldspars though, probably, so not at all the same in reality.
Lastly, my original glaze - in fact, from the bucket of glaze I used last time. I like it still - funny yellow though - in the foot ring, went sort of a snotty green, though. A few bubbles and just one bubble has burst and given me a blister. But it was much better than before.
I managed to get cone 02 bent right over, and 01 was starting to go.
Not sure what the conclusion is - I like the first glaze - simple - and my original glaze. But, the pots have a slightly flat feel to them. Dunno what to do about that. It felt less so when they were fired hotter and the decoration started to melt in to the glaze.
I think too that I need to consider my decoration a bit more, perhaps, as some of the marks weren't nice. A black slip would be good too (I've been keeping scrap red clay - turnings and off bits - to slake in to a slip.) Decoration isn't my forte, unfortunately.