Glaze Ingredients Req'd To Bring Out Effect Of Iron In A Clay Body?

[PottaFella]

Just read about this glaze by Scarva... "GZ2214 is a cone 9 stoneware glaze developed to react with iron in the clay body.  Bodies with a higher iron content will react more readily with the glaze, creating a beautiful reddish brown effect highlighting iron speckles. Bodies with lower iron content will yield a whiter glaze with fewer flecks."

 

It is too expensive for me I think at about £10 per kilo, but I'd like to find an ingredient I could add to my normal glazes that would bring out and exaggerate any iron in the clay.

 

Any suggestions anyone?

[Marcia Selsor]

Actually, the iron showing from the clay body is a characteristic of reduction firing. yesterday someone was looking for iron spangles to make streaks of iron on a glaze. Magnetite would do that..In the past, like decades ago, people used granular ilmenite in a glaze to add a speckled look. Some added granular manganese but that is mot a good chemical in breathe not to have skin contact.

Marcia

[neilestrick]

That's just a fancy way of saying the glaze will look different on a darker clay than on a whiter clay. All glazes do that for the most part, some more dramatic than others. Looks like your basic oatmeal spodumene glaze. I don't know that there's anything specific you can add to a glaze to make it happen, though. It's just the nature of the glaze.

[High Bridge Pottery]

I agree about the oatmeal spodumene kinda glaze. Seen a very similar effect with a glaze called Oatmeal white. Will see if I can track down the recipe from the friend who used it.