English: Spanish brown, red iron oxide, red oxide, ferric oxide, mineral rouge French: rouge Espagnol Spanish: rojo español
Mars red is the name given to the synthetic precipitated form of red iron oxide.
Origin and History Spanish red was the name given to red ocher and iron oxides produced in Spain since antiquity. After the 16th century, red ocher pigments produced in other countries were often given the name of "Spanish red" because of the popularity of the pigment among artists. Natural reds such as Spanish red or Persian red contain at least 50% iron oxide as hematite with tinting strength increasing with α-Fe2O3 content up to 95%.
Source Spanish red (red iron oxide) is produced in Spain by leaching a massive crude deposit with bacteria suspended in water. The mix is sprayed on the ore, and the run-off collected and chemically treated to recover high-purity iron oxide. The mine in Spain produces a red iron oxide purity that ranges from 83 to 88% by weight.
Permanence and Compatibility Minerals containing iron oxide yield pigments that are nontoxic, non-bleeding, relatively inert, weather resistant, and light fast. Spanish red is permanent, light fast and can be used with all pigments and in all vehicles.
Oil Absorption and Grinding Spanish red absorbs a moderate amount of oil.
Toxicity Spanish red is not classified as harmful if swallowed or as irritating to the eyes or skin. Care should be used in handling the dry powder pigment to avoid inhaling the dust.
Pigment: Spanish Red
Pigment Red 102 (77491)
ASTM Lightfastness Rating
4.4g/cm3 @ 20º C
28g oil/100 g pigment
Color: Red Color Index: Pigment Red 102 (77491) Chemical Name: Iron Oxide Acrylic: I Oil: I Watercolor: I Density: 4.4g/cm3 @ 20º C Refractive Index: 1.65 Oil Absorption: 28g oil/100 g pigment
Natural Pigments is a limited liability company based in Willits, California. We manufacture and distribute rare and hard-to-find materials for fine artists and decorators. We specialize in supplying artists' materials that were used in historical painting since pre-historic times up to and including the nineteenth century.
We constantly search for materials and products of the finest quality so that we can bring them direct to you from the source. To do so, we travel the world to find materials specifically for use by professional artists and decorators. We obtain minerals from mines in Afghanistan, Chile, Russia, Ukraine and Uzbekistan, to name a few places, processing these into natural pigments. We purchase resins, gums and plants from India, Kenya and Malaysia to make natural varnishes and painting mediums.
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