Underglaze decorating chalks. A word of caution: These colors are expensive and, in our experience, challenging to use. Probably not suitable for the classroom. However, accomplished artists may be able to develop creative techniques not possible with any other medium. Good luck.
Underglaze Chalk Set 208 - The Ceramic Shop
Amaco Underglaze Chalk Crayons, Set 208 – Sounding Stone
Glazes and Underglazes – Clayworks Supplies
AMACO Underglaze Chalk Crayons Set 2 : Ceramic And Pottery Glazes : Arts, Crafts & Sewing
Glazes and Underglazes – Clayworks Supplies
Underglaze & Glaze Shop — BKLYN CLAY
Aardvark Clays
Underglaze Chalk Crayons and Pencils : Underglazes
AMACO Semi-Moist Underglaze Set D contains 8 colors that includes 1.5 oz electric blue, amethyst, violet, red, light red, salmon, real orange and hunter green. Concentrated, semi-moist water soluble colors in pan form comes in hinged plastic boxes. Glazes are ideal for ceramic watercolor effects and detail painting. These Non-Toxic glazes can be intermixed or thinned with water for spraying or greater transparency and also can be applied to greenware or bisque.
Amaco Non-Toxic Semi-Moist Underglaze Set - A Pan, 1.5 oz. - Set 8
Amaco Underglaze Chalk Crayons, Set 208 – Sounding Stone
Amaco Underglaze Decorating Chalk Crayons SET 208
Amaco Underglaze Decorating Chalk Crayons Set 208
AMACO Underglaze Chalk Crayons Set 2 : Ceramic And Pottery Glazes : Arts, Crafts & Sewing
AMACO Non-Toxic Semi-Moist Underglaze Set - B in Pan, 1.5 oz, Assorted Color, Set of 8
AMACO Underglaze Decorating Colors Watercolors set 111
Underglaze Chalk Crayon Set #208 : Chalk Crayons