It amazes me how people can find out if something is poisonous/toxic/not good in general. For example, pigments, they seem simple enough, the foundation for color.
The City of Tucson’s Environmental Division has compiled a list of pigments and their hazards. The list has many detailed descriptions on pigments and their side effects if used incorrectly. Surprisingly, even though many pigments have drastic side effects like being a carcinogen (a substance that tends to produce cancer) or extremely toxic, they are being used still.
People may argue that these side effects can only occur if the pigment is used incorrectly and that the availability and cost may outweigh the negative effects of the pigment. Many people believe adding lead to paint makes it extremely toxic and dangerous, but in reality longtime exposure to lead is the only way to be afflicted by one of many drastic side effects that may include: raised blood-pressure levels and blood deficiency.
Lead is used because lead is very durable and lasts a very long time. Some examples of lead based pigments are: White Lead, Mixed White, Leaded Zinc Oxide, Red Lead and Bone Black are just some of the pigments with lead in them. Many lead based pigments have basic lead carbonate or PbCO3. Other lead based pigments could use lead tetroxide (Pb3O4) or lead chromate (PbCrO4), both of which are toxic.
If you want to learn more about pigments and what are in many of them, go to http://www.ci.tucson.az.us/arthazards/paint1.html for much more information.
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