http://www.naturalpigments.com/vb/ Rare and Historical Artists Colors and Materials en Tue, 21 May 2013 18:28:03 GMT vBulletin 1440 http://www.naturalpigments.com/vb/images/misc/rss.png http://www.naturalpigments.com/vb/ http://www.naturalpigments.com/vb/showthread.php?3463-Rublev-Orange-Ocher&goto=newpost Sun, 12 May 2013 11:42:07 GMT "Rublev Colours Orange Ocher is an opaque orange yellow with good tinting strength, fine grained and brushes “long” in the direction of the brush stroke. Our orange ocher is a single pigment color made of natural hydrated iron oxide and iron oxide mineral from the French quarries of Gargas and Rustrel nestled in a 12 mile long enclave in the heart of the Luberon Massif, the ocher country."

If the pigment is half as good as the description I'm happy. Katherine Stone does excellent work. Personally I use opposite colors instead of black, cobalt blue in this case. It gives me the same mixed color without any deadening of the mixture.
http://www.realcolorwheel.com/final.htm ]]> Pigments Donald Jusko http://www.naturalpigments.com/vb/showthread.php?3463-Rublev-Orange-Ocher http://www.naturalpigments.com/vb/showthread.php?3462-Toxicity-in-Pigments&goto=newpost Thu, 09 May 2013 00:13:22 GMT I'm trying to understand potential pigment toxicity in greater depth. Its a complicated subject in that there are different ways a pigment can enter a body (absorption, inhalation, ingestion); harmful effects vary depending on whether a pigment is absorbed, inhaled, or ingested; and pigments have different degrees of toxicity.

These variables are complications enough, but additionally I find very different assessments of how toxic certain colors are. For example I've seen raw umber described as very toxic, mildly toxic, and non-toxic (depending on how negatively the manganese is perceived). Cadmiums are generally described as very toxic - yet Gamblin's cad red does not carry a warning label at all because, as Gamblin notes, modern cadmiums actually have a very low level of bio-available cadmium in them. There are many confusing examples such as these.

I understand that no color is harmful if handled properly. Nonetheless, I'd like a better understanding of potential pigment toxicity. Can anyone recommend books or websites that describe, comprehensively, the potential toxicity of artist's pigments - taking into consideration the several variables outlined above?

Thanks

Koo ]]> Pigments Koo Schadler http://www.naturalpigments.com/vb/showthread.php?3462-Toxicity-in-Pigments