High Bridge Pottery

Just happy to be back at it I couldn't hold in the metaphors

For 6 months my brain has been empty but somebody just poured glaze into my ears .

Current challenge is a little empty, obviously missed the mark with that idea. New one will be starting in December, I always add the link to the newest thread in my signature.

Ok I will shut up about the stamp . Did you mix up a fresh batch for the two tests? It is certainly something strange. I have started getting into acid, alkaline and amphoteric thinking for glazes. Probably because I made it through chapter A of the potters dictionary Acids seems to be the glass formers, alkaline the flux and amphoteric a bit of both depending what else is there. The lack of silica I think is making something swap how it would normally act in the melt. Can't say I fully understand where I am going with this and the glaze just seems to have a lot of alkaline stuff in. Most limits seem around the same, little more here, little less there.

There is quite a bit of zinc and this could be where the colour is disappearing to along with the calcium. I have been thinking about the chemistry of it all and got lost along the way It is a good idea to add the oxides/stains if it is going to be that colour as it does impart something to the melt and the chemistry will change the colour. Curt I am with you about limit formula not adding up with experiments. I am starting to think there is a lot more weight towards what raw ingredients you use than I thought. I would also like to say thank you for bringing the topic up even if there never is a whole forum dedicated to the idea this thread has produced a lot of good knowledge for me. I still remember being stupid enough to weigh out 35 different glazes for my first tile who knew, volumetric blending... Joseph, I would try a square stamp then you can just leave the gaps for the props. I measured the thickness of one of my tiles and I am getting 4mm (1/8 inch) thick once fired. I certainly have some older tiles three maybe 4 times as thick but I think with a stamp you don't stretch the clay, only compress, then you can go much thinner. Slice straight from the bag with a cheesewire thin sidebars combo. Give the glaze a typecode in insight and add that to the tile. T001, T002... T00n. Then there's no need for the full recipe.

I really need to work on my kiln and get it running. Got plenty of bisque tiles that need some tests run but I lost my measuring cylinder in the move and also my accurate scales... I should stop complaining and just do it. Had the full weekend off and did nothing about it. silly me.

Still not sure I can work out why they say rest the glaze. Maybe with a full bucket if it is super bubbly or if the physical properties do change after sitting for a day. Talking to yourself is always the best, I do it while throwing too. It might be worth doing silicon carbide as an additive first to see if Si/Al ratios change anything with a set amount of carbide. Hard to know if there is any specific(ish) glaze chemistry you want in the base or how much carbide you need so you will still need a test with varying amounts. Getting into some exciting stuff

Why do you have to wait an hour for them to sit? You can do a tile in under an hour start to finish once you get into it. Hopefully you will find that smoother surface I don't see the problem with not testing on vertical tiles but that's just me.

DOH, at least you spotted it so D is now bottom right? Excited to see your tile.

Mine was from amazon, 500ml measuring cylinder and it was under 3 pounds.