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Winsor & Newton Cotman Watercolor - Light Red, 21 ml tube

Cotman Watercolors

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$8.02

Blick Art Materials · recorded Oct 21, 2026, 11:26 AM UTC

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Product details
Size
21 ml
Blick SKU
00325-3012
About this product range
  • Quality student-grade range
  • 40+ colors, including modern and historic pigments
  • Strong tint strength
  • Reliable transparency and lightfastness
  • Uniform consistency for beginners and students

Cotman Watercolors offer Winsor & Newton's renowned quality at an accessible price for students, beginners, and budget-conscious artists. Available in 8 ml and 21 ml tubes, the range features over 40 colors carefully selected for their tone, undertone, strength, and versatility in mixing.

Formulated with a blend of traditional and modern pigments—from natural earths to vibrant organic pigments—these colors allow for a variety of effects, from easy lifting to subtle washes to expressive, high-staining color. Most colors are transparent, with a smooth, consistent texture that makes them easy to work with, especially for those just starting out.

To keep the range affordable, a few of the more expensive pigments have been replaced with cost-effective alternatives—without sacrificing performance. With good to excellent permanence ratings, Cotman tubes are a reliable, affordable option for anyone looking to build a versatile palette without compromise.

Pigment information

General reference notes about pigments can describe other media (such as oil). They do not verify this product’s exact formulation or behavior.

Red Iron Oxide

Pigment code
PR101
Type
earth, synthetic
Chemical name
iron oxides (synthetic), iron oxide, silica, alumina, lime, and magnesia or hydrated iron oxide
Chemical formula
Fe2O2 or Fe2O3 x H2O
Properties
Red iron oxide varies in hue and transparency, depending on hydration and slight impurities. Indian Red is a slightly duller, deep brick hue with a bluish undertone. It is very dense and opaque, with excellent tinting strength and covering power. It is dependable when mixing with all other permanent pigments and yields good flesh tints when mixed with Zinc White. It is the synthetic version of PR102, which is a pigment made from earth reds, or natural red iron oxides, and the names applied to PR101 and PR102 often overlap. The synthetic red iron oxides have mostly replaced natural red iron oxides and are brighter, stronger, finer, and more permanent. Indian Red is the highest grade bluish shade. Light Red, English Red, and Venetian Red are yellowish shades. Mars Violet is a dull and subdued bluish or purplish oxide.
Permanence
Red iron oxide is very lightfast with excellent permanence.
Toxicity
Red iron oxide has no significant hazards.
History
Natural red iron oxide comes from the mineral ore hematite, called bloodstone by the ancient Greeks from the word hema, meaning blood. It is one of the oldest pigments, has been used by every major civilization, and was an important mineral for medieval alchemists. It was not widely used in artists' materials until the 17th century and was not produced in large quantities until the 18th century.
Description
Indian Red, Colcothar, English Red, Light Red, Mars Red, Mars Violet, Morelle Salt, Pompeian Red, Indian Red, Red Oxide, Sinopia, Spanish Red, Terra Rosa, Tuscan Red, Venetian Red, Venice Red.

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