HEAVY METALS
Many pigments that are used as colorants in printing inks are based on the chemistry of heavy metals. Typical heavy metals include:
• Barium • Cadmium • Chromium • Copper
• Lead Chromate • Manganese • Zinc
Like solvents, this is big list and each of these metals has environmental health and safety issues in their lifecycle. Many of these are actually or chronically toxic to humans, can be toxic to wildlife if released to the environment in wastewater and some known human carcinogens.
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