Transparent Yellow Felsite Pigment

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Rublev Colours Transparent Yellow Felsite is a yellow iron oxide earth pigment from a natural mixture of minerals from mineral deposits in Armenia. Learn more.

Rublev Colours Transparent Yellow Felsite is a yellow iron oxide earth pigment from a natural mixture of minerals from the Lori deposits of Armenia. Yellow ocher is not a true mineral but a mixture of similar hydrated iron oxide minerals.

Pigment Names
Common Names:English: yellow ocher
French: ocre jaune
German: Ockergelb
Italian: giallo ocra
Spanish: amarillo ocre

Origin and History

Known since antiquity, yellow ocher is from a natural mineral composing the pigment known as ocher (okhra in Greek). Ocher has been used as a pigment since prehistoric times and is perhaps the most widely used pigment for artists' paints.

Particle Size

80-85% ranging from sub-0 to 15 microns; remainder ranging up to 30 microns (with only 0.1% at 30 microns).

Permanence and Compatibility

Yellow ocher is among the most permanent colors among the artists' palette. It is compatible with all other pigments, and can be used with good results in all mediums.

Oil Absorption and Grinding

Information currently not available. This pigment is easy to grind in vegetable drying oils and water. 


Yellow ocher is not considered toxic, but care should be used in handling the dry powder pigment to avoid inhaling the dust.

Rublev Colours Pigment: Armenian Gold Ocher

Rublev Colours Pigment: Armenian Transparent Yellow Felsite

Pigment Information
Color Index:Pigment Yellow 43 (77492)
Chemical Name:Iron Oxide Hydroxide
Chemical Formula:a-FeOOH
ASTM Lightfastness Rating
Oil Absorption: 
Bulk Density:0.52g/cm3
Refractive Index:
Heat Stability:290° C
Water Solubility:< 0.42%
Ash:< 0.09%
Compaction Factor:1.29
Chemical Composition
Silicon Dioxide (SiO2)67.12
Aluminum Oxide (Al2O3)14.90
Titanium Dioxide (TiO2)0.52
Iron Oxide (Fe2O3)4.05
Manganese Oxide (MnO)
Calcium Oxide (CaO)1.24
Magnesium Oxide (MgO)0.58
Chromium Oxide (Cr2O)
Potassium Nitrate (K2O.N2O3)7.64
Trace Minerals3.95

Content of heavy elements (ppm):
Co<3,   Cu<10, Cd<5, Pb<5, Zn<5, Cr<5, As<25, Ba<150, Hg<30<, Sb<5, Se<50

More Information
BrandRublev Colours
VendorRublev Colours
Processing TimeUsually ships the next business day.
Pigment TypeInorganic, Earth, Natural

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Transparent Yellow Felsite Pigment
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