Mixing different brands of underglazes together?

[Judi Souder]

I am using Speedball and Amaco underglazes, and want to know if anyone has mixed them together to create new colors?  I fire to cone 5/6 oxidation.

[Sorcery]

I've mixed some. Not those particularly but test3 right.

Colors get muddy fast.  Add a little at a time and mix well.

Sorce

[neilestrick]

You can mix underglazes to get new colors, but it's not like mixing paint. For instance, mixing yellow and blue won't necessarily give you green. But you can tint colors very easily, like making a green a little more blue, or yellow a little more orange, or making color lighter or darker. The thing to remember is that the color you see before firing won't necessarily be the color you get after firing. Some colors will overwhelm others when they're fired. I've had colors where before firing a 50/50 mix looked perfect, but ended up using 90/10 to get it right when fired. So whenever I'm trying to mix new colors I always run a line blend- take two colors and mix them 90/10, 80/20, 70/30, etc till you've done all combos. Once you fire those you can do more precise blends to dial it in perfectly. I do my tests by weight with the liquid underglaze fresh out of the bottle. Trying to do it by volume takes forever and results in a lot of waste and mess and isn't as accurate.

[Judi Souder]

Thank you all for replying, I will try some mixes, but will do it gradually.  Happy Potting!

[Daisy55555]

Judi, Have you had success with mixing Amaco and Speedball underglazes? I’m wondering the same thing. I know I have to test but I’m curious how it’s going for you. Especially wondering about yellow and white before purchasing. : } 

Thanks! 

[Min]

@Daisy55555, @Judi Souder hasn't been back on the forum since her last post. You could try message her and ask (little envelope icon at the top of the page). Bright vibrant yellows usually have a cadmium inclusion stain, whites usually use zircopax. In theory it should be okay to blend the two but run some tests.