Michael Harding Ultramarine Blue - An obviously beautiful mid blue. The discovery in the 1820s of a Sodium Sulphosilicate compound, which had appeared as a mysterious blue deposit on soda-ash furnaces, was a liberating moment for financially challenged artists everywhere. Up to then the only available version of this compound was the often unobtainable Lapis Lazuli ore, mined in Afghanistan. Ultramarine has a high Tint Power. This shade produces strong green shade blue hues, and makes wonderful violets with Magenta and the red Lake colors. It is useful in greens and greys.
Color Index | PB29 |
Drying Speed | Average |
Transparency | Transparent |
Lightfastness | Excellent |
Oil Content | Average |
Tint Power | Average |
Toxicity | Non-Toxic |
ASTM D-4236 | ✓ |