Chromium Oxide Green (PG 17): The Versatile and Durable Pigment

Chrome Oxide Green Pigment under our microscope

Chromium Oxide Green (PG 17): The Versatile and Durable Pigment

Introduction

Chromium Oxide Green, also known as Pigment Green 17 (PG 17), is a widely used inorganic pigment known for its excellent durability, opacity, and stability. With a distinct earthy green hue, it has been a favourite among artists, manufacturers, and industrial applications for decades. In this blog post, we’ll explore its origins, properties, uses, and advantages in watercolour and other mediums.

Origins and History

Chromium Oxide Green (Cr2O3) was first synthesized in the early 19th century and quickly became an essential pigment in various artistic and industrial applications. Unlike other green pigments, such as Viridian (PG 18), which is a hydrated chromium oxide, Chromium Oxide Green is a pure, stable oxide form that is chemically resistant and lightfast.

Characteristics and Properties

• Chemical Formula: Cr2O3
• Color Index: PG 17
• Opacity: Opaque
• Lightfastness: Excellent (ASTM I)
• Toxicity: Low (but should not be inhaled as a dust)
• Permanence: Very high
• Tinting Strength: Moderate
• Granulation: High (granulates beautifully in watercolors)

One of the most notable characteristics of Chromium Oxide Green is its natural, muted, and slightly warm green tone. It is much more subdued compared to synthetic greens, making it perfect for natural landscapes and realistic paintings.

Advantages in Watercolor and Other Mediums

1. Exceptional Lightfastness and Permanence

PG 17 is one of the most stable and permanent green pigments available. It does not fade over time, even under direct sunlight, making it an excellent choice for archival-quality artwork.

2. High Opacity and Coverage

Unlike many other green pigments, Chromium Oxide Green is naturally opaque, providing strong coverage. This makes it particularly useful in gouache and acrylic applications where solid colour layers are needed.

3. Earthy, Natural Appearance

This pigment’s muted, earthy green hue is perfect for painting landscapes, foliage, and natural elements. It blends well with earth tones and neutral colors, offering depth and realism.

4. Strong Granulation in Watercolor

When used in watercolour, PG 17 produces a beautiful granulating effect, which adds texture and dimension to washes. This makes it especially valuable for landscape painters looking to create organic textures in trees, grass, and moss.

5. Chemical Stability

Unlike organic pigments that can degrade over time, Chromium Oxide Green remains chemically stable. It does not react with acids, alkalis, or other chemicals, making it useful in various industrial coatings and applications.

How It Compares to Other Green Pigments

While Viridian (PG 18) and Phthalo Green (PG 7) offer brighter, more vibrant greens, Chromium Oxide Green is valued for its natural, subdued tone and excellent opacity.

Best Uses for Chromium Oxide Green in Art

• Watercolour: Adds texture and depth to landscapes, foliage, and mossy surfaces.
• Acrylic: Provides strong, opaque green tones with high durability.
• Oil Painting: Works well in traditional landscape painting and as a mixing colour for natural greens.
• Gouache: Excellent for layering due to its opacity.
• Pastels: Used in soft pastels for their subtle, natural green tone.

Final Thoughts

Chromium Oxide Green (PG 17) is a reliable, durable, and highly versatile pigment that should be a staple in any artist’s palette. Its natural tone, granulating effects, and opacity make it a unique and valuable addition for landscape painters and those who prefer earthy greens over synthetic, vibrant hues.

Whether you are an artist looking for a trustworthy green pigment or a manufacturer in need of a highly stable green for coatings, PG 17 remains one of the best choices available.

What are your thoughts on Chromium Oxide Green? Have you used it in your work? Let us know in the comments!