Hoover 402RU Raw Umber

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Hoover 402RU Raw Umber

Product OverviewTypical PropertiesColor Display

Umbers are one of the oldest pigments used by mankind, based on the naturally occurring Umber ore. These natural Iron-Oxides are known for their durability. They are both lightfast and chemically resistant. As such, they are considered permanent pigments. Hoover Color’s 402RU balances the need of product quality and cost. This pigment disperses on a high-speed disperser to a lower level than Hoover Color’s best grades, but can still be media-milled to the desired grind specification. By eliminating Hoover Color’s premium grinding step, Hoover Color can pass the cost savings on to our customers.

One of the characteristics that make Raw Umbers such a useful pigment is that it is a “neutral toner.” Often brighter colored pigments are too bright (or have too much chroma) for a given application. Adding a black pigment to darken these colors adds an undesirable color component from the black. Raw Umbers maintain a neutral tone, reducing a brighter pigment’s chroma without affecting the hue. As a result, Raw Umbers are a major component in today’s Architectural Coatings coloring systems and other tinting systems.

Properties Description
Appearance Brown Powder
Chemical Composition Goethite
Pigment Index Brown 7
Color Index 77491
CAS No. 12713-03-0



* Tint Tone: reduction with TiO2 1:4.
**The color shades presented here are as accurate as monitor settings allow.**
**They may be different from shades in actual application and are for reference only.**


Coating, Leather Coatings, Paints & Colorants, Paper, Artist materials, Adhesive, Wood Stains, Others