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The 21″ x 30″ (approx. 20″ x 30″ / A2+) color mounting board is a rigid, sturdy board featuring smooth, vibrant blue shades on one side and a neutral backing (usually white or pale) on the reverse.
Blue Color Varieties and Specifications
Available Blue Tones: Commonly sold in Sky Blue (light pastel blue), Deep Blue / Marine Blue (vibrant royal blue), and Navy Blue (dark, deep navy).
Dimensions: 21 inches by 30 inches (approximately 508 mm x 762 mm or 594 mm x 840 mm depending on the exact supplier cut).
Thickness: Ranges from 1.0 mm to 1.2 mm (approx. 800gsm to 1000gsm), providing a firm, non-bending structure.
Design: One side is finished in solid matte or semi-gloss blue, while the reverse side is plain white or off-white.
Uses and Crafting
Applications: Ideal for mounting posters, architectural scale modeling, school assignment backdrops, signage, and framing artwork.
Handling: Easy to cut with a sharp utility knife and a metal ruler; accepts PVA glue, double-sided tape, and various paints or markers cleanly