Produces blacks, browns, and violets in terra cotta for rich ceramic finishes
Can create metallic surfaces at high temperatures for unique effects
Flux action with silica and alumina for varied color results
Fern-like stains in Mocha Ware achieved with tobacco juice and manganese dioxide
Dissociates to release oxygen at temperatures under 2000°F, causing pin holing in glazes above 2000°F
Summarized by Shop
(MnO2) A metal oxide that produces blacks, browns and violets. In terra-cotta bodies, around 5 % can be added to produce dark grey to black colors. In glazes, large amounts (over 20%) can produce metallic surfaces, which are NOT dinnerware safe. The fern like stains in Mocha ware are achieved with the combination of tobacco juice and mang
Chemical Formula
MnO2
Color
Black
Recommended Additions
0.5–5% for terra cotta; >20% for metallic effects
Flux Action
Produces violet or brown colors at high temperatures
Dinnerware Safety
Not safe for dinnerware use at high concentrations
