These boards are really just layers of paper or pulp that is rolled together with adhesive to make a thicker paper. Fom-Cor, also known as foam board, is a very popular for modeling and framing. Choose from brands you trust such as Crescent, Bienfang, Strathmore, Letramax & Nielsen-Bainbridge.
For Art's Sake: How to attach artwork or photos to matboard and backing board
What is the difference between Bristol, Bristol Boards, and Illustration Boards? - Strathmore Artist Papers
Mat Board Center, Pack of 10, 11x14 Self Adhesive Foam Board for Picture and Poster Mounting, Lightweight White Color Foam Board for Crafts, Artworks, School Projects, 3/16 inches Thick : Office Products
How to Add Glass and Art to a Picture Frame - FineWoodworking
How to Measure and Cut Matboard
Mounting Board and Matboard
How to Mount Photos to Foam Board Mounting Boards or Mat Boards Tutorial by MountingBoards.com
Easy Way to Mount a Poster with Mat Board Yourself - ReStyleGraphic
Art board
Custom Photo Foam Board Prints
20Pack Foam Core Board, 11x15 White Foam Board, 316 Algeria
How to Make a Mat Board From Foam Board
Foam Core Board - 48 x 96 , Black, 1/2 thick S-13724 - Uline
Gator Foam - Versatile Boards for Artists - Jackson's Art Blog