NOTE: Size “32x40 Raw Sheet*” - Uncut directly from manufacturer, not exactly 32x40: may be 1/16 undersize and up to 1/4 oversize, and not square.

Uncut (Blank) solid Barinbridge 4Ply Alphamat mat board sheet with NO opening. If you need a window cut in the mat to show your artwork then go to standard mat board. This is sheet matboard for those cutting their own mats, or wanting to use this matboard to mount their photo to. Avaiable in over 60 frame sizes including full mat sheet size of 32x40 inches.

Click here: for pre-cut Alphamat board with opening

Need CUSTOM? Select CUSTOM under
"Choose Size"

Not sure about the color?
Click Here: Color Mat Sample Kit

Bainbridge Artcare™ Alphamat MatBoard – 1/16 inch thick. ACID FREE museum-quality preservation mat board. Actively protects from air born pollutants. Reduces yellowing and fading. Free of ground wood and lignin. Fade and bleed resistant. Conservation quality matboard. 

Backing board sold separately here: Foamcore

If you are not sure about the color you can order our Color Matboard Sample Kit or stop by a store such as Michaels and view their Bainbridge mat samples.

Mat board composed of Alpha-cellulose fiber which meets the most stringent standards for stability and permanence. This mat board is treated with the Bainbridge Artcare™ Archival System with MicroChamber® technology allowing it to actively protect the image from air born pollutants and acid by-products within the picture frame. Guaranteed color consistency.

Recommended for valuable works of original art, rare and antique documents, fine art prints, limited edition prints, and photographs.

Meets and exceeds FACTS Guide for Permanence in Mat and Mounting Boards. Mat board is buffered to maintain alkaline pH with an Alkaline reserve of 3-5% as measured by ANSI IT9.2-1991 Sec 5.2

Features solid white or black archival core for clean consistent bevels. Vellums are smooth-surfaced.