Iron oxide Color
Raw Siennas are unique shades of natural yellow with a brown undertone.
Burnt Siennas are brownish shades with good transparency and heat stability characteristics. They are used extensively in producing mahogany, cherry, and rosewood colored stains. They are also used by the art material industry to produce flesh tones when combined with TiO2 white.
Natural Red Iron Oxides are natural red products that vary in shade from bright red to maroon, often with a brownish undertone. They are less expensive than Synthetic Iron Oxides and normally exhibit better corrosion resistance due to lower soluble salt levels. These pigments are used extensively in making metal primer paints and coatings.
Burnt Umbers offer the best value in brown pigments. These materials are in high demand in the stain industry because of their transparency. Burnt Umbers have a reddish undertone and exhibit good heat stability.
Raw Umbers are also an excellent value in brown pigments and popular in the stain industry due to their transparency. Though they are not heat stable, raw umbers can be used to produce many warm gray tones. They are also used extensively by the colorant houses to darken a color without seriously affecting its chromaticity.
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