Schmincke Horadam Naturals Watercolor - Rügen Chalk, 15 ml Tube

Naturals Watercolor

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  • Blick Art Materials
    $18.84 USDShop
    Recorded Oct 21, 2026, 1:44 PM UTC

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Product details
Size
15 ml
Blick SKU
86335-1042
About this product range
  • Superior quality colors made from naturally derived sources
  • 100% vegan formula
  • Rare, single-origin plant and mineral pigments
  • Less processed for subtle variations of color and texture

Schmincke Horadam Naturals Watercolors are a distinctive range of vegan, naturally derived colors featuring pigments sourced from plants, earth, and rocks. In addition to classic colors, such as Yellow Ochre, the range includes colors such as Turmeric, Indigo, and Madder—rare in modern professional palettes, but known to artists and craftspeople worldwide for centuries. While natural colors may lack the lightfastness of modern synthetics, they have a unique and subtle beauty that is irreplaceable and unique to find in such an artist-friendly format.

Additionally, Naturals includes mineral colors—but unlike the earth pigments typically found in artists’ colors, which rely on highly processed and standardized earth pigments, Schmincke has selected less-processed, single-origin pigments for the Naturals line. These colors retain more of their original character, offering subtle variations of texture inside each tube. Unlike traditional watercolors, Horadam Naturals are free from animal products. The binder, composed of simple and time-tested gum arabic, ensures effortless dilution and reactivation with water after drying.

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.

Calcium Carbonate

Pigment code
PW18
Type
inorganic
Chemical name
calcium carbonate
Chemical formula
CaCO3
Properties
Calcium carbonate, the mineral constituent of chalk, is a low tinting strength, inexpensive white pigment that is often used is a buffer and filler. Because of its low tinting strength, it is overwhelmed by other colors. It is used in gesso and other coatings to give the surface more tooth, a desirable characteristic for some painting techniques.
Permanence
Calcium carbonate is lightfast. Like all carbonates, it reacts with strong acids
Toxicity
Calcium carbonate is completely non-toxic, and is used in many food, cosmetic, and pharmaceutical products. However, excessive consumption is not recommended.
History
Naturally occuring chalk deposits have been mined since prehistoric times. Rocks and minerals that contain calcium carbonate include aragonite, calcite, vaterite, chalk, limestone. marble, and travertine. Calcium carbonate is the principle component of lime, used in many agricultural and industrial applications.
Description
Chalk

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