Winsor & Newton Professional Watercolor - Cobalt Blue, 5 ml Tube

Watercolor

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$11.24

Blick Art Materials · recorded 2026-10-21T07:23:02.696962000Z

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Product details
Size
5 ml
Blick SKU
00319-5181
About this product range
  • The trusted choice of professional watercolorists since 1832
  • Expansive range of 100+ colors
  • Majority single-pigment formulations for optimal mixing
  • Lightfast, permanent, and tested for color strength

Winsor & Newton Professional Watercolor Tubes are renowned for their enduring quality and heritage dating back to 1832. Trusted by renowned artists like John Singer Sargent, these watercolors combine historical recipes with modern advancements in pigment technology. Powerful, luminous, and unparalleled in their clarity, an expansive range of over 100 colors allows artists to create a palette that best suits their work.

Individually crafted for optimal pigment dispersion, over half the range features single-pigment formulations for predictable and accurate color mixtures. Colors are thoroughly tested for lightfastness and tint strength to ensure your work remains vibrant over time. A range of granulating colors allows artists to achieve beautiful textures that can be maximized through mixing.

__Cadmium-Free__-Formulated by chemists and approved by artists, these new paints deliver the same cadmium color strength, vibrancy, transparency, and lightfastness you expect, but without the cadmium.

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.

Cobalt Blue

Pigment code
PB28
Type
inorganic
Chemical name
cobalt(II) oxide + aluminum oxide
Chemical formula
CoO + Al2O3
Properties
Cobalt blue is a semitransparent pigment with low to moderate tinting strength. When it dries, it appears lighter and less saturated. Pigment particles are large and grainy. Differences in how the pigment is ground and mixed lead to considerable differences in its performance among various manufacturers.
Permanence
Cobalt blue is absolutely lightfast and extraordinarily stable. The stability of cobalt salts at high temperatures make them the standard for blues used in ceramics and glassware.
Toxicity
Cobalt salts are toxic. Avoid respiratory and skin contact. Soluble cobalt may cause irritation and allergic reaction through contact with skin. It is considered a possible carcinogen.
History
Since ancient times, smalt blue has been used to color glass and ceramics. Cobalt salts, which give smalt its characteristic blue color, were identified in the 18th century. Techniques for manufacturing Cobalt Blue, a chemically pure salt of cobalt and aluminum oxide, were developed in 1802.
Description
Smalt Blue

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