Dark Green Opaque Pigment In Rajasthan

Dark green opaque pigments are used in various applications including fine art, industrial coatings, plastics, and inks. Here's a detailed overview of some common types of dark green opaque pigments:

🎨 Common Dark Green Opaque Pigments

1. Chromium Oxide Green (PG17)

Chemical Name: Chromium(III) oxide

Color Index: PG17 (Pigment Green 17)

Appearance: Earthy dark green, opaque

Opacity: Very high

Lightfastness: Excellent

Oil Absorption: Low (good for oil paints)

Toxicity: Low, but chromium compounds require caution in dust form

Uses: Artists’ paints, ceramics, industrial coatings, plastics

Pros: Very stable, weather-resistant, excellent UV resistance

2. Phthalo Green (PG7 or PG36) + White or Black

Chemical Name: Copper phthalocyanine (PG7 = blue shade, PG36 = yellow shade)

Color Index: PG7, PG36

Modified for opacity: Phthalo green is naturally transparent; often combined with titanium dioxide (white) or carbon black for opacity.

Appearance: Intense green, can appear dark and opaque when mixed

Lightfastness: Excellent

Toxicity: Low

Uses: Paints, inks, plastics

Pros: Intense color, high tinting strength

Cons: Can stain and be overpowering in mixes

3. Cobalt Green Deep

Chemical Composition: Cobalt(II) oxide + chromium(III) oxide

Color Index: PG19 or PG26

Appearance: Dark bluish green, duller than phthalo

Opacity: Opaque

Lightfastness: Excellent

Uses: Fine art painting, ceramic glazes

Pros: Subtle color for mixing, permanent

Cons: Expensive

🧪 General Properties of Opaque Green Pigments

Property Detail

Lightfastness Most are highly lightfast (especially inorganic types)

Opacity Chromium oxide and cobalt greens are highly opaque

Toxicity Generally low, but caution with dust and heavy metals

Staining Phthalo greens stain heavily; oxide pigments less so

Durability Excellent in outdoor or industrial applications

🧰 Applications

Fine Art: Oil, acrylic, and watercolor painting

Architectural Paints: Long-lasting exterior coatings

Plastics: Durable coloration for molded parts

Ceramics: Heat-stable glazes

Inks: Offset and screen printing