Ratings
| Lightfastness | I | Excellent Blue wool 7-8. The pigment will remain unchanged for more than 100 years of light exposure with proper mounting and display. (Suitable for artistic use.) |
|---|---|---|
| Transparency | T | Transparent Transparent |
| Staining | 3 | Medium-Staining Partially liftable once dry. |
| Granulation | Y | Granulating Pigment particles are uneven and clearly visible. |
Manufacturer Description
Ultramarine Blue plots cooler and bluer than the more saturated French Ultramarine. Temperature aside, both blues have equal permanence, lightfastness and transparency. Ultramarine Blue is slightly less granular in concentrated washes. For less saturation, sedimentation and cost, use Ultramarine Blue straight, for vibrant crayon-like color or mixed with a cool red for dark, effective neutrals.
Ultramarine Blue and French Ultramarine both contain pigment PB29, but Ultramarine has a smaller pigment particle size and is slightly greener and cooler than French Ultramarine, which has a larger pigment particle size and is slightly redder and warmer.