Chrome Yellow Light is a chromate of lead, and is similar to the lead salt that occurs naturally as the mineral crocoite. It is an intense yellow pigment with good hiding power.
Chrome Yellow Light is a chromate of lead, and is similar to the lead salt PbCrO4 that occurs naturally as the mineral crocoite. It is obtained synthetically as a yellow crystalline powder by precipitation from a solution of a lead salt (such as lead nitrate) and sodium chromate or sodium dichromate, and is used as a pigment either alone or in admixture with other compounds. Synthetic chrome yellow pigments are among several bright pigments with good hiding power that vary from light greenish yellow to reddish medium yellow, consisting essentially of normal lead chromate usually without extenders (such as barite or clay) but often other lead compounds (such as lead sulfate) for the lighter shades, such as primrose.
|Colour Index:||Pigment Yellow 34|
|Chemical Name:||Lead Chromate/Lead Sulfate|
|Chemical Formula:||PbCrO4 • PbSO4|
|ASTM Lightfastness Rating|
|Bulking Value:||250-300 ml/g|
|Refractive Index:||alpha = 2.31, beta = 2.37, gamma = 2.66|