Natural Black Iron Oxide Pigment Dispersion
Natural Black Iron Oxide Aqueous Pigment Dispersion is made using pigment from the last remaining European company operating the ochre deposits in the French quarries of Gargas and Rustrel, nestled in a 12-mile-long enclave in the heart of the Luberon Massif, the ochre country. It is a dense, opaque, heavy color that is absolutely permanent. It is comparatively cool to neutral in undertone, wets easily, and is non-greasy compared to carbon blacks. It is a valuable pigment when these qualities are required.
Natural Black Iron Oxide Aqueous Pigment Dispersion
| Pigment Names | |
| Common Names: | English: black oxide French: oxyde noir German: Oxid Schwarzes Italian: ossido nero Japanese: 酸化物黒 Portuguese: óxido preto Spanish: óxido negro |
| Alternate Names: | English: black iron oxide, iron oxide French: fer oxydé, naturelle noir Indien Mars black is the name given to the artificial substitute of natural black oxide. |
Origin and History
Black oxide is a recent development in modern pigments and was unknown in artists' palettes before the 19th century.
Source
Natural black oxide is usually from an iron ore called magnetite. Magnetite, also known as lodestone, is a ferrous ferric oxide (ferrosic oxide) that is a heavy, black color and opaque. Theoretically, black iron oxide contains slightly more iron metal than red oxide but not nearly as much as yellow oxide. The native mineral may contain varying amounts of manganese, sulfur, clay, and silica.
Permanence and Compatibility
Natural black oxide is an absolutely permanent color for all uses on the artist's palette. It is compatible with all other pigments and can be used with good results in all mediums.
Oil Absorption and Grinding
Natural black oxide absorbs a moderately low amount of oil. The oil absorption ratio is 10–15 parts by weight of pigment to 100 parts by weight of linseed oil. If the measurement were grams, it would require 100 grams (by weight) of linseed oil to grind 10 to 15 grams (by weight) of pigment to form a stiff paste. It makes an average-drying oil paint and forms a hard, fairly flexible film.
Toxicity
Natural black oxide is not considered toxic, but care should be taken when handling the dry powder pigment to avoid inhaling the dust.
Rublev Colours Pigment: Natural Black Iron Oxide
| Pigment Information | |
| Color: | Black |
| Colour Index: | Pigment Black 11 (77499) |
| Chemical Name: | Ferrous ferric oxide produced from magnetite ore |
| Chemical Formula: | Fe3O4 |
| ASTM Lightfastness Rating | |
| Acrylic: | I |
| Oil: | I |
| Watercolor: | I |
| Properties | |
| Density: | 5.15 |
| Hardness: | 5.5–6.0 |
| Refractive Index: | n=2.42 |
| SKU | 280-30 |
|---|---|
| Brand | Rublev Colours |
| Vendor | Rublev Colours |
| Processing Time | Usually ships the next business day. |
| Color | Black |
| Pigment Type | Inorganic, Natural |
Health & Safety: There are no acute or known chronic health hazards with the anticipated use of this product (most chemicals are not thoroughly tested for chronic toxicity). Protect yourself against potentially unknown chronic hazards of this and other chemical products by avoiding ingestion, excessive skin contact, and inhaling spraying mists, sanding dust, and concentrated vapors from heating. Contact us for further information or consult the SDS for more information. Conforms to ASTM D-4236.
