Expert: Leisha Hiester - 7/27/2009

Question
I do alot of work with low fire earthenware. I use the horse hair and feather technique more than any oTher. This past weekend I saw some pieces similar to what I do buy they had colorful stains on them that almost looked watercolor. I am wondering if you know what I ccould use to get that affect. It had to be a stain because the hole pot was covered in it even the foot. Hope you can help. Thanks a bunch. -roman

Answer
Roman,
Do you do Raku or electric? The colorful stains I'm aware of are produced with highly toxic materials known as soluble salts. You should probably take a class or do extensive research before working with any of them because they are highly toxic in inhalation and ingestion. Everyone I've known that works with them uses full protective gear and a respirator. The results are beautiful and they produce unbelievable results, but again, please, please be careful and seek someone experienced.

Ferric Chloride or FeCl2×6H2O is a soluble metallic salt—fuming agent. There are a range of
soluble metallic salts like bismuth subnitrate, silver nitrate, copper sulfate, cobalt sulfate, ferric chloride, and stannous chloride, used to create fumed luster effects on glazed wares and to create surface effects on unglazed saggar-fired wares. Most are water soluble, but highly toxic.
Please be careful.
Leisha