Mayco RK105 Copper Penny Raku Glaze, Pint Opaque Underglazes or overly darken its fired

or overly darken its fired color

that Al2O3 can be supplied by clay

Cobalt Oxide is the most powerful ceramic colorant and it appears in glaze recipes at 1% or less

Lengthens the drying time after the glaze is brushed on

like many lithium-bearing compounds

Mayco RK105 Copper Penny Raku Glaze, Pint Opaque Underglazes or overly darken its firedCoppy Penny develops a glossy copper finish with various iridescent shades of blue and purple following a proper raku firing. Due to the unpredictable nature of this firing technique, results will vary with every firing. To apply, shake for 5 6 seconds, stir well and apply 2 coats to bisqueware. Allow to dry thoroughly and fire to cone 06 (1850F, 1010C). Reduce in your choice of combustible materials. Thinner coats tend to produce greater metallic