Bainbridge® Acid-Free features a solid black core and satin black finish on both sides. An ideal choice for many specialty framing projects such as framing newspaper articles which require a dark backing to prevent "ghosting" (the newspaper's backside shows through to the front page). It is also used as a finished background for "floating" art in a frame and for shadow boxes with dimensional objects (medals, pocket watches etc). Made with pride in Bridgeview, Illinois. Cannot be used with canvas float frames.