Blue Opaque Pigment In Gujarat

Blue opaque pigments are used in a wide range of applications — from fine art to industrial coatings and plastics — where strong, saturated blue color and good opacity are required. Below is a detailed overview of blue opaque pigments:

Common Blue Opaque Pigments

1. Ultramarine Blue (Pigment Blue 29)

Chemical Composition: Sodium aluminum sulfosilicate

Opacity: Semi-opaque to opaque

Lightfastness: Excellent

Heat Resistance: Very high (up to 350°C)

Toxicity: Non-toxic

Notes: Made historically from lapis lazuli, now synthesized; vibrant but can be slightly weak in tinting strength.

2. Phthalo Blue (Pigment Blue 15)

Chemical Composition: Copper phthalocyanine

Color Index: PB15:1 (green shade), PB15:3 (redder shade)

Opacity: Typically transparent, but can be made opaque by:

Milling with opacifiers like titanium dioxide

Using certain resin systems

Lightfastness: Excellent

Tinting Strength: Very strong

Toxicity: Generally non-toxic

Uses: Widely used in paints, inks, plastics

3. Cobalt Blue (Pigment Blue 28)

Chemical Composition: Cobalt(II) aluminate

Opacity: Semi-opaque

Lightfastness: Excellent

Cost: Expensive

Toxicity: Low in finished form, but dust can be harmful

Notes: Stable in high-temperature applications like ceramics and glass

4. Cerulean Blue (Pigment Blue 35)

Chemical Composition: Cobalt stannate (cobalt-tin oxide)

Opacity: Opaque to semi-opaque

Lightfastness: Excellent

Weather Resistance: Very good

Notes: Muted, grayish-blue with excellent durability

5. Titanium Blue (Modified Blue with TiO₂)

Made by: Combining blue pigment with Titanium Dioxide (TiO₂)

Opacity: Very high due to TiO₂

Applications: Automotive, architectural coatings

Notes: Custom blends to improve hiding power and achieve specific hues

 Key Properties of Opaque Blue Pigments

Property Description

Opacity Ability to block light from passing through; important for coverage.

Lightfastness Resistance to fading under light exposure.

Weather Resistance Especially relevant for outdoor uses.

Chemical Stability Important in plastics, coatings, and industrial applications.

Tinting Strength How much a pigment can color another material when mixed.