Rublev Colours Dispersion Blue Ridge Raw Umber - 2 fl oz

Umber is a yellowish brown to greenish brown mineral pigment used in tempera, oil and watercolour, obtained from natural earths coloured by the oxides of iron and manganese. Just as with sienna, the chemical composition of umber is closely related to its iron oxide content. What makes umber different is the increased content of manganese. Other substances naturally occurring in umber, include clay, talc, and calcium carbonate, do not affect its color greatly. Umbers with the highest tinting strength are those with the highest content of iron and manganese. Some of the finest umber comes from Cyprus and may contain up to 16% manganese oxide. German umber typically contains 1-2% manganese, English umber 7%, and umber from the Russian and Ukraine about 4% manganese.

Dispersed in water ready to be mixed with water-based mediums and especially made for use with traditional painting mediums, such as egg, casein, fresco, watercolors and distemper (glue tempera). They are also ideally suited for use with gesso for making toned grounds for drawing and painting.

Pigment dispersions from Rublev Colours contain only naturally-derived ingredients, in addition to pigment and water, making them ideally suited for traditional and natural mediums. Unlike other pigment dispersions that are typically made for acrylic medium, Rublev Colours Aqueous Dispersions do not contain coalescent solvents, artificial dispersing resins and other additives that interfere with natural mediums.

Rublev Colours Aqueous Dispersions make preparing traditional mediums easy; you do not have to hassle with powders, grinding pigments with expensive tools and calculating pigment-binder ratios to make water-based paint. They make adding the right amount of paint binder simple and easy. For example, preparing egg tempera has never been easier, because the dispersion makes measuring the right amount of pigment easy—you simply add egg and stir—there's no guessing how much egg to add to the pigment.