What are the lightfast properties of the pigments sold by Hoover Color?
The term lightfastness is defined as the ability of a pigment to resist fading after exposure to sunlight. Almost all of the pigments that Hoover Color sells are lightfast. This includes all of our Iron Oxide Pigments, both the Naturals and Synthetics, Chromium Oxide Greens, Mixed Metal Oxides, BC-35 Lampblack Substitute, and Bone Blacks. Most prehistoric art uses the same mineral pigments as those sold by Hoover Color. Therefore, we have as much as 30,000 years of exposure information confirming the permanance of these colors. There are two exceptions to this rule. The first is the Tuscan Red and Orange Pigments that we manufacture. These pigments are blends of iron oxides with brighter organic pigments. These organic pigments are less durable then then the iron oxides and will fade over time. However, even though they will fade over long-term exterior exposure, they will never fade completely. For example, an organic red would fade to an almost whitish pink, while Tuscan Red would on
