Make Underglaze from Slip? Let's find out! 

Sure thing! It's not quite the same as underglaze, but depending on the effect you want it can work well.

Thanks so much!

Thank you

Thanks!

Thanks Bob. I think you're right about the COE. I've been having more crazing with my clear glaze and think I need to ramp up the glass formers (from my limited understanding of glaze chemistry). As far as using Darvan - that's an interesting idea. For my large batches of slip I don't notice a huge sensitivity to the amount (once I have enough). It might be interesting to see if in a small batch it does get more fluid.

​@@PotterybyKent Re: COE and "good fit." - I've found DigitalFire to be a good resource. Ultimately, it seems it's the glass formers that are the most important factor when it comes to crazing. Re: Decorative slip - When I make my Decoratve slip I've been using my bone dry scrap ^5-6 B-mix rehydrated at 1000g clay to 600g water, which yields a very thick slip which I use as a base. If I want something more "paintable" I add about a 1/4-1/2 teaspoon of Darvan to 400g of slip. The transformation is pretty amazing. Previous experiments with painting leatherhard pieces with a slip containing more water have sometime led to a piece crumbling in a few minutes; this is less likely to happen when using a deflocculant. FWIW I also have Sodium Silicate on hand, but have been not using it so much as it can shorten the life of my molds. One last thought: I recently went to a 0.6mm nozzle for one of my 3D printers; it's proved to be a good choice in terms of shortened print times, and I can still get pretty detailed mold masters at 0.15mm resolution.

Sure thing. I got the tape from amazon - amzn.to/3Cqmp29

@@PotterybyKent Thanks for your helpful and fast reply!

It might and really depends on the amount of pigment in the slip you apply to the surface and how thick it goes on.

Cebu , Phillpines!

Thanks! I'm not sure I can help directly. But what I'd suggest is finding some sort of local class or studio and talk with them. Or even a local potter who can give you pointers.

That would depend on the relative costs of your ingredients, and kiln firing costs. My kiln is HUGE so often I can pack in more pots, especially in a bisque firing where I don't need to worry about most of them fusing together (like I would in a glaze firing).

Slip is clay - so ends up with a different surface finish than glaze