Blue Underglaze
I'm in search of a dark blue underglaze with good brushability. I want it to behave like ink painting- to be able to dilute to get value & maintain good brushability that is visible when painting on bone dry.
I've tried 2 different shades of Amaco's LUG series, but don't like the consistency, or visibility. I've also tried cobalt oxide with gerstley borate & frit, which brushes better and depth is more visible.
Wondering if anyone has experience with other commercial underglazes or recipes to share?
Comments
Let me look ...
Fine red clay (I use Redart) 75
Amakusa (I use Cornwall Stone) 25
Cobalt Oxide 1.2
RIO 1.7
Apply thin for bisque under a clear glaze. This is a subdued blue not harsh at all.
Vinod
Can add more Co to get darker - depends on the thickness of application and on your covering glaze.
33 EPK
33 Frit 3124
33 Stain or oxide
starch.
You may have to tone down the Cobalt.
try it by tablespoon for a start . 1/1/1
http://coyoteclay.com/underglaze.html
For years I used a painting slip for blues for cone 10 reduction base on Albany slip. If you can find some:
Albany 90
RIO 10
Cobalt Carb. 1
I remember it as being brushable (like 10,000 irises worth), stable and not harsh.
Might be time to try it in the wood kiln...
For years I used a painting slip for blues for cone 10 reduction base on Albany slip. If you can find some:
Albany 90
RIO 10
Cobalt Carb. 1
I remember it as being brushable (like 10,000 irises worth), stable and not harsh.
Might be time to try it in the wood kiln...
So, no gerstley, clay, or gylcerin?