12x18 Mat Board Uncut Variety Pack 25 Assorted Colors

American frame carries matboard in several different thicknesses a match thickness can be measured in fractions of an inch but it's also expressed in terms of a mats ply ply is the number of layers of material used to make a mat the higher the ply the thicker the mat when you choose a mat pay attention to how thick it is you'll need to add this measurement to the thickness of other materials such as your art acrylic glazing and mounting board to ensure that the whole stack fits into the frames channel frames have different sizes of channels called a rabbet the four ply map board is the thinnest mat that we carry it's made of four layers of material either alpha cellulose or cotton rag the layers are bonded to a treated board or core for plain map words are generally 1/16 of an inch thick and rag maps can be slightly more substantial we also carry six ply conservation grade mat boards ma