Okay folks, here are the results of my glaze testing! Now, you may be interested to know that all of these samples are the exact same glaze recipe. Yes, it’s gram for gram the same, except for tiny adjustments to the amounts of two colorants – Rutile and Iron. Some of these have a little more of one, or a little more of the other, or a balance between the two.
Above, you can see the results on test tiles made of porcelain clay (most of my current work is in porcelain). Below, you can see the dramatically different results these glazes give you on dark stoneware clay:
Personally, I’m leaning towards the recipe with 3% rutile and no iron at all. It looks good on porcelain AND stoneware, and I think the soft porcelain look would contrast nicely in a bowl or cup containing a bright glassy blue on the inside. It also has a beautiful almost “snowflake” crystallization going on:
It would look equally good on stoneware, albeit a much earthier, natural effect:
Some other close contenders include this iron heavy, reddish/black version:
And a matte, earthy green with a lovely texture:
What I pick may wind up being my dominate glaze for a new holiday line of work. What do you think? Which are your favorites? Can’t stand one? Inquiring minds want to know!!