Archival Mountboard comes in three weights and in two colours - white (slightly off white) and cream. It is made from chemically-treated pulp using pH sizing and lignin-free and buffered with calcium carbonate.
For extra defence it contains a buffer of calcium carbonate to guard against contamination by air-borne acid for the life of the board. The core of the board is made from high-quality alpha cellulose, lignin-free and bright white throughout, it is buffered with calcium carbonate. The adhesive used to bond the board together is aqeous PVA with neutral pH and is plasticiser-free.
