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.
Chalk Crayons
AMACO Non-Toxic Semi-Moist Underglaze Set - B in Pan
AMACO Underglaze Chalk Sets – December Specialty Glaze of the
Aardvark Clays
Glazes and Underglazes – Clayworks Supplies
Underglaze Decorating Crayon Set (209) – Highwater Clays
Underglaze Decorating Chalk Set #209
Alexandria – Page 5 – Clayworks Supplies
Glazes and Underglazes – Clayworks Supplies
AMACO Underglaze Chalk Crayons Set 2 : Ceramic
Glazes and Underglazes – Clayworks Supplies
Ceramic decoration with unusual, effective styles and a variety of textures can be created with AMACO Underglaze Decorating Chalk Crayons. The 2 3/4
AMACO Underglaze Decorating Chalk Crayon Set #209
Amaco Underglaze Chalk Crayons, Set 208 – Sounding Stone
Alexandria – Page 5 – Clayworks Supplies
Amaco Lead Free Underglaze Chalk Crayons