GOLDEN OPEN slow-drying acrylic paint — Cobalt Green 148 ml, extended working time & excellent lightfastness

This 5 fl. oz. tube delivers a deep, slightly bluish green with excellent permanence and creamy handling. Formulated with PG26 (Cobalt Chromite Green Spinel), the colour offers ASTM Lightfastness I (Excellent) and a semi-opaque finish, making it a dependable choice when colour integrity and longevity matter. The OPEN formulation keeps paint workable longer than standard acrylics, reducing wasted colour and enabling refined transitions and layered glazing without compromising archival quality.

How does this paint behave on the palette and canvas?

The OPEN formula slows evaporation so the paint stays moist and workable for much longer than conventional acrylics, giving you time to adjust gradients and edges. It levels smoothly on canvas and supports both thin glazes and more opaque passages depending on dilution and medium choice.

• Extended working time for multi-stage blending
• Semi-opaque coverage suitable for layering
• Compatible with OPEN mediums and standard acrylic mediums
• Maintains colour consistency as it dries

What are the colour and permanence characteristics of Cobalt Green?

Cobalt Green here is a deep, slightly bluish green that reads rich and stable in mixtures and straight from the tube. The pigment PG26 offers excellent lightfastness and opacity properties, so your mixes and glazes retain chroma and resist fading over time.

• Pigment: PG26 (Cobalt Chromite Green Spinel)
• ASTM Lightfastness I (Excellent)
• Semi-opaque pigmentation for versatile application
• Vegan formulation with stable inorganic pigment

How does OPEN acrylic save paint and extend technique options?

Because OPEN acrylics dry much slower than standard acrylics, you use less paint overall: colour stays on the palette and in your mixtures instead of becoming unusable crusts. This longer working window makes detailed glazing, soft-edge blending, and complex colour shifts achievable without constantly remixing hues.

• Reduces waste by preserving on-palette mixtures
• Enables glazing and multi-stage blending workflows
• Mixable with fast-drying acrylics to tailor drying times
• Works with standard acrylic supports and brushes

Which mediums and surfaces pair best with GOLDEN OPEN Cobalt Green?

OPEN paints pair well with GOLDEN OPEN mediums for even longer working time or with standard acrylic gels and pastes when you want textural body. Use on primed canvas, acrylic-primed panels, heavy paper, or boards — the paint adheres and cures to a durable, archival film once fully dry.

• Blend with OPEN mediums to extend open time further
• Compatible with standard acrylic gels and matte/gloss mediums
• Recommended for primed canvas, panels, and heavy paper
• Allow proper curing time for long-term durability

Who is this for: GOLDEN OPEN Slow-Drying Acrylic in Cobalt Green is geared toward professional artists, advanced students, and serious hobbyists who need reliable colour permanence and a longer working window for glazing, portraits, landscapes, and layered techniques. If you value archival lightfastness, creamy handling, and the option to mix with both OPEN and standard acrylic systems, this tube is built to support those workflows.