Middle chrome yellow is also known as Pigment Yellow 34. The main component of lead chromate pigments, chemical composition PbCrO4, content of about 90% to 94%, the appearance is a reddish yellow powder, in the monoclinic crystal, density 5.1 ~ 6.0g/cm3 oil absorption of 13 ~~ 27g/100g. Middle chrome yellow is an excellent color seepage resistance, hiding power, living in the light chrome yellow and deep chrome yellow, lightness and light chrome yellow, equal, is superior to deep chrome yellow, acid resistance and light chrome yellow equal, is superior to the deep chrome yellow , alkali resistance, good dispersion.
Chrome yellow is a nitrate, such as lead nitrate, chromate, such as sodium dichromate for raw materials, strict control of reaction conditions to form a stable monoclinic crystal of chrome yellow particles, filtration, drying and crushing. Mainly used in the coatings, especially road sign paint, ink and plastic. Chrome Yellow is a natural yellow pigment made of lead(II) chromate (PbCrO4). It was first extracted from the mineral crocoite by the French chemist Louis Vauquelin in 1809.
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