Chalk Crayons (individual dry underglaze sticks: 2 3/4" x 7/16") can be used like pastels on bisque pottery, which results in a pebbled appearance. Colors may be blended or smoothed by rubbing with the fingers or a swab of cotton on a toothpick. Water color effects are obtained by brushing sketches with water. For fine lines, the chalk crayons can be sharpened.
Clear Transparent AMACO® Glazes LG-10, F-10, DC-10, and HF-9 are recommended as a covering glaze. Sponge on first coat of clear glaze lightly in order not to smear design. Let dry and brush on additional coats of clear transparent AMACO® glaze. Pieces are fired to the maturing temperature of the covering glaze. When spray application of a covering glaze is desired, first refer to individual listing to be sure that it may be sprayed safely.
NOTE: The maximum firing temperature is Cone 10 for the following: Black, Brown, Dark Blue, Dark Green, White, Gray, and Medium Blue. The maximum firing temperature is Cone 5 for the following: Turquoise, Yellow, Dark Brown, Blue-Green, Light Brown, Medium Green, and Yellow-Green. The maximum firing temperature is Cone 05 for the following: Rose and Lilac.
If left unglazed, AMACO® Underglaze Chalk Crayons should not be used on surfaces which come in contact with food or drink. AMACO® clear glazes LG-10, F-10, and HF-9 or any other dinnerware safe glaze are recommended to be used over AMACO® Underglaze Chalk Crayons to make them dinnerware safe.
AMACO® Underglaze Chalk Crayons have only been tested and approved as dinnerware safe when applied and fired under AMACO® LG-10 Clear Glaze