Cobalt Violet Light Pigment

Description

Cobalt Violet Light is a delicate, semi-transparent violet pigment made from cobalt phosphate (Co₃(PO₄)₂). It produces a gentle, pastel like violet leaning toward lilac or lavender, with a soft granulating texture in watercolor and smooth, luminous transparency in oils and acrylics.

Compared to darker cobalt violets (based on arsenates, PV14:1), the "light" variety is paler, cooler, and airier in tone. It is prized for glazing, atmospheric effects, floral painting, and subtle mixing, where its low tinting strength allows nuanced layering without overwhelming other colors.

History

Cobalt violets were first introduced in the mid-19th century, providing a permanent alternative to the highly fugitive organic violets and purples (like alizarin crimson mixed with ultramarine). Early versions were cobalt arsenates, beautiful but toxic.

By the late 19th century, cobalt phosphate was developed as a safer, more stable formulation. Marketed as Cobalt Violet Light, it became a specialty pigment favored by Impressionist and Post-Impressionist painters who needed permanent violets for flowers, skies, and delicate highlights. In the pictured artwork 'Irises' by Monet, Cobalt Violet Light is used throughout to create the beautiful purple of the irises

Though expensive and weaker in tinting strength than many modern synthetics, it remains a favorite for artists seeking subtlety, historical authenticity, and lightfast permanence.

Pigment Information

Pigment Type: Synthetic Inorganic
Chemical Composition: Cobalt Phosphate (Co₃(PO₄)₂)
Source: Synthesis of cobalt and phosphate compounds
Origin: Europe (19th century origin)
Suitable Mediums: Watercolor, Oil, Tempera, Acrylic, Encaustic
Lightfastness: Excellent
Opacity: Semi-transparent
Other Names: Cobalt Violet, Cobalt Violet Pale, Cobalt Phosphate Violet
Color Index Code: PV14
Image: 'Irises' by Monet from the National Gallery

Health and Safety

• For art use only. Not for cosmetic, food or children's use.
• Keep out of reach of children and pets. Do not eat, drink or smoke while working.
• Avoid creating or breathing dust. Work in a ventilated area and wear a NIOSH approved dust respirator (P100 or better) when handling dry pigment.
• Wear gloves and eye protection. Wash hands and work surfaces after use, and never rinse pigment into drains.
• Do not spray apply, sand or burn.
• If swallowed or if you feel unwell, contact a poison control center (U.S. 1-800-222-1222) or a doctor.
• Safety Data Sheet available on request.

Caution: Contains cobalt. May cause an allergic skin reaction. May cause allergy or asthma symptoms if dust is inhaled. Avoid breathing dust and repeated skin contact. Do not rinse into drains.