Red Sartorius Earth
Red iron oxide or ferric oxide is the principle coloring agent in red ochers, such as red Sartorius earth. This color is based on the natural mineral hematite associated with varying proportions of other minerals such as clay, chalk, and silica. They differ from other Ochres in that they do not contain water. In other words, the iron to which they owe their color is iron oxide, not hydrated iron oxide.Composition and Permanence
For a detailed explanation of the terms in the table above, please visit .Notes
Some 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 is scraped to show undertones.