Tuesday, March 13, 2012

Red 40 Lake

Referred to as a "Coal Tar" dye. The phrase has little meaning today but a hundred years ago it was used to describe synthetic chemicals that started out with coal tar as a precursor. It's more likely today to find a petrochemical as the original base of most synthetic chemicals, though they're so highly refined that you won't find any residual petroleum in the product.

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While most dyes are water soluble, lake dyes are water-insoluble. That means that lake dyes will not bleed or run together because they do not dissolve in water very well.

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