Stains or underglaze colours
Posted 09 May 2012 - 02:11 PM
I've been trying to work out the difference between body & glaze stains and underglaze colours.
I need to colour terra sigillata for some of my work but also paint patterns on bisque for other pieces of work. Can I just buy one kind of stain to do both jobs?
If I get the glaze & body stain to use for the terra sigillata and just add frit for underglaze work this should be ok?
Will it really make that much difference?
Posted 09 May 2012 - 02:31 PM
I prefer premixed commercial underglazes, rather than the frit/stain mix. Both work, but the commercial underglazes will stay suspended better, and brush better IMO. Plus they're super easy to buy and you don't have to mess with mixing them yourself. Some brands will fire up to cone 6, but many will not. I've had great luck with Speedball at cone 6, and they're usually the cheapest out there.
If you've got stain and frit, give it a try. You may like it just fine. If not, then invest in premixed underglazes.
Kiln Repair Tech
Owner, Neil Estrick Gallery, LLC
Posted 09 May 2012 - 06:07 PM
Underglazes are the most forgiving and wonderful things! They fire from 06 to cone 10 and beyond with testable color changes. You can leave some unglazed or glaze over. If you let them thicken up you can use them as slips. They are being engineered for the 'color your pot' places so they just keep getting better and more consumer friendly.
You all might get sick of hearing this ...BUT ... Try it!! Test it!! There are no huge punishments for messing up. No pottery police will arrive to repo the clay. The reason we know what not to do is because we did it and failed ... Fall down seven times, get up eight times.
Contemporary Fine Colored Porcelain
"My Artwork would not exist without a thriving global pottery community.
In the isolation of a studio, an artist can begin to feel like an island, but in truth
we are all part of archipelagoes; chains of islands loosely connected by a stream
of information that enhances our Artwork.”
Posted 10 May 2012 - 10:09 AM
1 to 3 parts frit.
1 part Bentonite.
The bentonite keeps the stain in suspension.
You can combine stains such as blue and green to get a light green.
As always, test,test,test on a tile, not on your masterpiece.
The most common Fritt for this is 3124.