In crafting with paper, glass or even paints and stains, opaque is a term used to describe the material's ability to block light. Opaque means light cannot travel through the object; in other words, it is neither translucent nor transparent. Opaque properties may apply to any color of crafting material.
Acrylic PMMA Opaque/pastel Color Sheets, 3.0mm Thickness .118, 34 Colors/3 Sizes Available
Transparent vs Opaque Colours in Oils and Acrylics – Marion Boddy-Evans
Opaque Colors - Co-Motion Cycles
Scott Hutchison – A List of Transparent and Opaque Oil Pigments
Opaque & Transparent Watercolours
Opaque Pigments - Tester pack (20 colors)
Opaque Pigment 25ml - Barnes
Color Cast Acrylic Rod (Unpolished): Delvie's Plastics Inc.
Which paint should I use for lure painting? - Lureblanks
Airbrush Paint Transparent vs Opaque
What Are Opaque Colors?