Solid woodless underglaze chalk drawing pencils which can be sharpened in most pencil sharpeners. Choxil underglaze pencils are applied to bisque ware and all colours are stable to Cone 8 except Rose, which is stable to Cone 4. Firing range between 06-cone 8 except Rose - 06 to cone 4. Colours included: black, blue, brown, deep red/brown, green, grey, lavender, rose, turquoise and yellow.