Winsor & Newton Cotman Watercolor - Sepia, 21 ml tube
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Products bearing the AP seal of the Art & Creative Materials Institute, Inc. (ACMI) are certified non-toxic. A product can be certified non-toxic only if it contains no materials in sufficient quantities to be toxic or injurious to humans, or to cause acute or chronic health problems when used as intended. See [Health and Safety ](https://www.dickblick.com/learning-resources/product-info/health-safety/ "Learning-resources/product-info/health-safety")for further information.
Product Details
- Description:
- Cotman Watercolors
- Color:
- Sepia
- Size:
- 21 ml (.71 oz)
- Format:
- Tube
- No.
- 609
- Series:
- 1
- Mfg #:
- 0308609
Shipping Note - Due to manufacturer distribution restrictions, Winsor & Newton products cannot be shipped to addresses outside of North America.
Colors on Monitors -
Due to differences in users’ monitors, the colors presented are an approximation of the true color.
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Pigment Information
This color contains the following pigments:
PBk7-Lamp Black
PBr7-Burnt Sienna
Pigment Name
PBk7-Lamp Black
Pigment Type
inorganic
Chemical Name
carbon
Chemical Formula
C
Properties
Lamp black is a very opaque, heavily staining black pigment that does not have much covering or tinting power. It is typically the most opaque black in watercolor form. Though a very pure black, it tends to muddy slightly in mixtures. Natural sources may be brownish or bluish in tone because of impurities. When used in oil paints, it is one of the slowest drying pigments, and should not be used in underpainting or applied in layers underneath other colors.
Permanence
Lamp Black is very lightfast and absolutely permanent. It is used in all techniques in permanent painting.
Toxicity
<p>Carbon itself is not considered hazardous, however other combustion products that are hazardous are often present as impurities when Lamp Black is produced from natural materials. For this reason, commercial preparations of the pigment should be considered slightly toxic. Avoid skin contact and inhalation. Where such impurities are present, Lamp Black is a possible human carcinogen.</p>
History
Lamp Black is a carbon based black traditionally produced by collecting soot (known as lampblack) from oil lamps. It has been used as a pigment since prehistoric times. It is the black found in Egyptian murals and tomb decorations and was the most popular black for fresco painting until the development of Mars Black.
Pigment Name
PBr7-Burnt Sienna
Pigment Type
earth
Chemical Name
iron oxides
Chemical Formula
Fe2O3
Properties
Burnt Sienna is a warm, mid-brown color formed by burning the yellow-brown limonite clay called Raw Sienna. It ranges from semi-opaque to semi-transparent due to the combination of its opaque, red-brown mass tone and its transparent, orangey undertone. It is an excellent mixing complement for blues and greens and creates salmon or peach colored tints when mixed with white. It can be useful for subduing bright colors and does not get chalky in dark mixtures.
Permanence
Burnt Sienna has good permanence and is considered one of the most versatile of the permanent pigments.
Toxicity
Burnt Sienna has no significant hazards.
History
Burnt Sienna has been used as a pigment since prehistoric times, but its current name came about during the Renaissance. It comes from the city of Siena, in Italy, and is short for terra di Siena, meaning earth of Siena. Sienna was famous for the mining and production of earth pigments from the Renaissance until World War II. Due to the depletion of clay deposits in Tuscany, Italian siennas now come from other areas, including Sicily and Sardinia.
Safety Data Sheet
UPC Code: 094376902662
ASIN #: B0054WSJHA