Mat BLANK - Mat board cut down from a larger sheet to the outside dimensions of your backing material, glazing, or frame - ready for you to cut the window opening, or float mount (top mount) your artwork directly on top of the mat board.
RAG - Made from cotton.
Rag mat boards offer the highest level of quality available. Made from the purest cotton rag pulp which is naturally acid free and requires no treatment to render them archival, and subject to rigorous quality control, each board is hand-inspected for cleanliness and integrity. 4 ply (1/16")
Perfect for Fine Art Prints, Valuable Documents, Photography, Originals, High-End Limited Editions, Rare or Antique Documents