Watercolors

Watercolors are painting pigments suspended in a water-based vehicle, typically gum arabic. They are applied to paper, and their transparency relies on the white surface rather than opaque paint.

Materials include pigments (natural or synthetic), gum arabic as binder and vehicle, and optional additives such as glycerin. Paper is central: cotton-based, sized to control absorbency, commonly 140–300 gsm, with hot-pressed, cold-pressed, or rough textures. Brushes range from natural hog or sable to synthetic; palettes and water jars complete the kit.

Techniques include washes (flat and graded), glazing for depth, wet-on-wet for soft edges, and lifting to preserve white highlights. Colors are mixed with water and built up in transparent layers to create luminosity.

History and use: Watercolor has roots in East Asian brushwork and matured in Europe in the 18th century as a portable sketching medium. It gained prominence in Britain with Turner and Constable and remains popular in both illustration and fine art.

Preservation: Use acid-free papers and store away from direct light; framed works are often protected with UV-filtered glass. Watercolors are sensitive to humidity and temperature changes, which can affect paper support and pigment.

Variants: Gouache is an opaque water-based variant with chalk; watercolor pencils and inks extend the range of the medium.