Friday, 4 October 2013

Information on Pigments used in Paints

Each pigment that Colors of Nature uses has been carefully researched for its safety and ecological impact. Here is a summary of the information available. Sources include manufacturers’ descriptions and MSDS data:

Pigment TypeSourceProcessingEcological Information
Ochres- Clay earth pigment
- Iron oxide from geothite
Washed by water and dried by the sun- Non-toxic
- Not listed as a carcinogen by the NTP, IARC, or OSHA; no adverse long-term effects are known

“There is no evidence to suggest that this substance will create any significant ecological properties if released into the environment. Inorganic pigments are insoluble and should not exhibit any bioaccumulation or biodegradation properties.” (MSDS)
Umbers- Clay earth pigment
- Iron oxide from geothite
Raw or burnt (heat applied)Not listed as a carcinogen by the NTP, IARC, or OSHA; no adverse long-term effects are known.

“Inorganic pigments are insoluble and should not exhibit any bioaccumulation or biodegradation properties”. (MSDS)
Oxides- Naturally occurring iron oxides from hematite or magnetiteHeat appliedNot listed as a carcinogen by the NTP, IARC, or OSHA; no adverse long-term effects are known

“Inorganic pigments are insoluble and should not exhibit any bioaccumulation or biodegradation properties.” (MSDS)
Siennas- Clay earth pigment
- Iron oxide from goethite or hematite
Raw or burnt (heat applied)Not listed as a carcinogen by the NTP, IARC, or OSHA; no adverse long-term effects are known

“Inorganic pigments are insoluble and should not exhibit any bioaccumulation or biodegradation properties”. (MSDS)
Chromium Oxide- Chromite ore
- Chromium oxide
Two chemical steps: roasting (ore is treated with hot air) and leaching (converts metal to a soluble salt in a water medium)FDA approved.

Not classified as a hazardous material (MSDS)
Ultramarine- Pigment Blue 29:77007
- Sulfurized silicilic acid, aluminium sodium salt from zeolite, lazurite
Manufactured from clay (contains silica, alumina), sodium sulfate, sulfur and charcoal.

Heat applied, then washed
Food and cosmetic grade

No evidence of carcinogenic effects according to ACGIH or IARC (MSDS)
Titanium dioxide- Ilmenite ore
- Titanium dioxide
Iron oxide is removed to leave synthetic rutile, which is reduced with carbon and oxidized with chlorine. Compound is re-oxidized with oxygen to regenerate the chlorineFood, pharmaceutical and cosmetic grade

Environmental Effects: No known significant effects or critical hazards (MSDS)

For more information please visitThe Organic Make-up Company
Vehicles for pigmentPlant: gums, oils, waxes; simple sugar alcohol, water, natural preservativeVariety of methodsFood, cosmetic and pharmaceutical grades

Biodegradable

No evidence of carcinogenic effects according to ACGIH or IARC (MSDS)