Coloring stoneware slip: dark navy blue

[Nata Pestune]

Hello everyone!

I am trying to find a combination of colorants to color my stoneware slip into a dark navy blue. does anyone has experience? Just using cobalt oxide doesn’t seem to work and adding a bit of black, also. Maybe there are more variations that could lead to a dark blue color?

Thank you! 

[Bill Kielb]

Mason stains would be a more what you see is what you get approach. Testing for sure to ensue it fires to your taste.

[Hulk]

Check the reference guide Reference Guide | Mason Color Works
Most of the blues have refs:
   1, can be used as a body stain;
   3, max 2300°F;
   6, with or without zinc

[Jeff Longtin]

Hello Nata. Welcome to the Forum.

Do you have access to Mason Stains?

I find Delphinium Blue, at 2%, and Best Black, at 1%, result in a nice dark blue. (Anymore black and it overpowers the blue.)

Vivid Blue, alone, is nice at 2-3%, for a deep blue, but not so "dark". (For that black is really necessary.)

If you don't have access to Mason you can look up their ingredients and guess from there. (As they don't list percentages.)

 

[Nata Pestune]

Hello everyone! thank you for your replies!

i do t have access to mason stain, but have some alternatives here (in Germany). I have tried them already and they turned all to have a greenish shade, i guess, the colorants had some chrome? 

will check mason stain ingredients and see if i can achieve the color.

Thanx a lot!