Gamblin 1980 Oils - PBr7-Burnt Umber (Calcined natural iron
oxide, manganese)
Gamblin’s approach is different. 1980 colours contain pure
pigments, the finest refined linseed oil, and marble dust (calcium carbonate).
Since oil painting began, these three ingredients have made more affordable colours.
Painters experience true colours without homogenized texture
or muddy colour mixtures. Gamblin's approach of using both traditional raw
materials and processes ensures that artists experience the luscious working
properties that they expect from their oil colours.
Burnt Umber: Vigorous drier due to high manganese content.
Burnt Umber is helpful as an underpainting drawing colour. Because of the high
oil content, use thinly in under layers.
PIGMENT COMPOSITION AND PERMANENCE
- Pigment Name: PBr7-Burnt Umber (Calcined natural iron oxide,
manganese)
- Pigment Type: earth
PROPERTIES
Burnt umber is a more intense reddish-brown pigment produced
by heating Raw umber's clay pigment. It has medium to excellent tinting
strength and high opacity and is quick-drying in oil form. Burnt Umber is
more transparent than Raw Umber.
It has excellent colour properties and can create a variety
of subtle, clear tints when mixed with white.
It can tend towards chalkiness in dark oil mixes, but
overall, it mixes well with other colours. To create a black colour in oil
form, mix Burnt Umber with Phthalo Blue or Ultramarine. Mix it with Ultramarine
or Payne's Gray to achieve a similar colour in watercolour form.
PERMANENCE
Burnt Umber has good permanence.
TOXICITY
Burnt Umber itself is considered non-toxic. If contaminated
by manganese compounds, it may be highly toxic if inhaled and moderately toxic
if ingested.
HISTORY
This pigment comes from the Latin word umbra, meaning shadow
or shade. Its full name is terra di ombra, meaning earth of shadow/shade, due
to its original extraction from Umbria, Italy. It has been used as a pigment
since prehistoric times. Currently, the finest umber comes from Cyprus.
