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.


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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