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The History of Molybdate Oranges
Chrome was discovered by the French chemist Nicolas Louis Vauquelin in late 1790 in the mineral crocoite (lead sulfochromate). Vauquelin studied the different chrome compounds and found he could obtain a wide range of colors from greenish-yellow to orange shades.
A synthetic lead chromate (mainly chrome yellows) manufacturing process was published in 1809, although they were not mass produced until 1820 when the first large chrome deposits were discovered in North America.
Molybdate Oranges have been the most widely used oranges and reds in the paint and plastic industry for many decades. Its use is currently restricted in several countries due to the Lead and Chrome (VI) content in its composition.