Inorganic:
Red Umber is a synthetic iron oxide. this pigment had lighter and redder characteristics than those it assumed when manufactured in animal bladders. Raw Umber is calcinated to make the pigment, and the amount of Manganese Dioxide mixed with the Iron Oxide determines the range of undertones; my formulation is much warmer than is usual.
| Drying | Very Fast |
| Transparency | Semi-Transparent |
| Lightfastness | Excellent |
| Oil Content | Average |
| Tint Power | Average |
| Toxicity | Non-Toxic |

Copic Sketch Sky B24
Copic Sketch Special Black 110
Copic Sketch Ice Blue B12
Copic Sketch Pale Porcelain Blue B000 


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