[up to] 20x30 Dual Black/Gray Backer Board

This Dual Black/Gray Backer Boards are ideal for backing of posters, decorative art prints, craft projects and photographs. 4 ply (~.050" thick), solid black throughout with a dark gray surface one side.

Custom Mat Size: Type in the custom size wanted, up to 20x30 or 20x20 Square.

• The mat will be cut down to your new size.
• Both sides of the new dimensions must be able to fit within the 20x30 mat board.
• If they don't, choose a larger 'up to Mat size' that fully fits your new size.
• If option left empty, the Mat will be cut as a 20x30 Mat

Standard Grade (acid-free mat boards)

Matboards in this category are constructed of wood pulp that is treated with calcium carbonate to slow the harmful effects of acid and lignin. These are also known as decorative matboards.

This type of matboard is recommended for general matting and framing presentations. Suitable for most everyday matting needs.