Jet Black Velvet Underglaze may be muted when used under SM-10 Clear Satin. 

SM-10 Clear Satin is a silky, stiff zinc-free clear glaze that works well as a liner or over underglazes. Use 2 coats over underglazes to show the color.

Safety Warning: Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.  

Saturated color, dependability, and versatility make Velvets as popular for professionals as they are for children. Velvets fire true-to-color as a Cone 05/06 underglaze or fired to Cone 6.
Some colors remain true as high as Cone 10.

Try two finish possibilities: When left unglazed these colors have the rich textural appearance of velvet; when covered with AMACO Clear Transparent Matte or Clear Gloss they intensify in color. Can be easily applied to wet clay, greenware, or mature Cone 04 bisque (1971F / 1077C)

Saturated Color | Apply to unfired clay or bisque | True to color
Can be used with or without glaze - Food Safe with proper glaze
Cone 05 to 10 | Sprayable