The contents of a picture frame - including the glass/mountboard/artwork/backing board
Foam Board LION Picture Framing Supplies Ltd
Picture Framing Backing Board - choice of sizes
Art Supplies and Materials
Finishing the back of a picture frame
Gator Foam - Versatile Boards for Artists - Jackson's Art Blog
Backing Board LION Picture Framing Supplies Ltd
Frame prices explained: Why is picture framing so expensive?
10ct./ 11x14 or 12x16 White Foam Board Precut Foamcore Artist Craft Supply Art Backing Mount Artprint Picture Framing Artwork Decor Display
Made an e-paper (e-ink) magic picture frame, that shows new pictures from Deviantart every day. A video on how I made it coming soon-ish. : r/raspberry_pi
UK Picture Framing Supplies Blog - Latest News & Articles on Frame Hardware & Hanging