1. a substance added to a material to make it opaque or less transparent
Usage: commonly used in manufacturing, cosmetics, and materials science

Examples

• Titanium dioxide is a common opacifier used in paints and coatings.
• The cosmetics company added an opacifier to the lotion to give it a creamy appearance.
• Glass manufacturers use opacifiers to produce frosted or milky glass products.
• The opacifier in the plastic film prevents light from passing through.
• Ceramic glazes often contain opacifiers to achieve a matte finish.