Hydrated iron oxide is the principle coloring agent in yellow ochers. This color is based on the natural mineral goethite associated with varying proportions of other minerals such as clay, chalk and silica. They differ from other ochers in that they contain water. In other words, the iron to which they owe their color is hydrated iron oxide. Natural yellow ochers are semi-opaque, absolutely permanent and have good covering power.
Composition and Permanence| Italian Dark Ocher | |
| Color: | Yellow |
| Binder: | Linseed oil |
| Additive(s): | None |
| Pigment Information | |
| Pigment: | Yellow ocher |
| Pigment Classification: | Natural inorganic |
| Colour Index: | Pigment Yellow 43 |
| Chemical Name: | Iron oxide hydroxide |
| Chemical Formula: | α-FeOOH |
| CAS No. | 1310-14-1 20344-49-1 20344-49-4 51274-00-1 |
| Properties | |
| Code: | 308 |
| Series: | 1 |
| Opacity: | Semi-Transparent |
| Tinting Strength: | Medium |
| Drying Rate: | Medium |
| ASTM Lightfastness: | I |
| Permanence: | A - Permanent |
| Safety Information: | There are no acute or known chronic health hazards associated with the anticipated use of this product (most chemicals are not fully tested for chronic toxicity). Always protect yourself against potentially unknown chronic hazards of this and other chemical products by keeping them out of your body. Do this by avoiding ingestion, excessive skin contact, and inhalation of spraying mists, sanding dusts and vapors from heating. Conforms to ASTM D-4236 |
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NotesSome separation of pigment and oil may occur in Rublev Colours Artist Oils and is a natural process when no wax or stabilizers are added to paint to prevent this from occurring.
All images of color swatches in this web site are only approximations of the actual color of the oil paint. We have taken every care to match the color in these pictures on calibrated color monitors to the actual color. However, because of the wide variance in color monitors the results you get may vary.
Color Swatch Note: The color swatch was created with a thick application (left side) of color and a tint (right side) made with equal parts of color and titanium white and applied on acrylic primed cotton canvas.
Drawdown Note: The image of the "drawdown" contains a pre-mixed paint film of 6 mil (0.006 inch) thickness applied to a standard test card for the purposes of examining color consistency, opacity and other qualities. The drawdowns show the color full strength (mass tone), on the left, and mixed in a 1:2 ratio with titanium white on the right. The bottom area of the drawdowns are scraped to show undertones.
| Color Names | |
| Common Names: | English: yellow ocher French: ocre jaune German: Ocker gelb Italian: ocra giallo Portuguese: amarelo ocre Russian: охра желтая Spanish: ocre amarillo |
| Alternate Names: | English: dark ocher French: ocre foncé German: dunkler Ocker Italian: ocra scura Russian:земля светлая желтая Spanish: ocre oscuro |