Duncan E-Z Stroke Translucent Underglazes - EZ 037 - Black - 1 Ounce Jar Duncan E-Z Stroke Translucent Underglazes intense pigment allows for high definition and decoration on your pieces. E-Z Stroke Underglazes are ideal for airbrushing, antiquing and brushwork. They can be applied directly to greenware or bisque and layered over most underglazes, allowing the basecoat to show through. Theyre safe for serving food when coated with a Duncan food-safe clear glaze. AP Certified Non-Toxic. Made in USA. Firing range cone 06 to cone 6.