For full information on Mountboard Standards, visit: www.fineart.co.uk

1 Cotton Museum Mountboard (sometimes known as Rag) Virgin cotton fibre, containing no post consumer waste (recycled fibre). Naturally lignin free. Buffered with calcium carbonate. Solid boards, or with museum quality facing and backing papers.

2 Conservation Mountboard Containing no post-consumer wate (recycled pulp). Chemically purified to remove almmost all the lignin and is buffered with calcium carbonate. Solid boards, or with museum or conservation quality facing and backing papers.

3A Standard Mountboard - White core Wood pulp chemically purified to remove the lignin, buffered with calcium carbonate to a pH of 7 to 9.5

3B Standard Mountboard - Cream core and colour core
Untreated wood pulp buffered with calcium carbonate to a pH range of 7 to 9.5. Contains lignin which will cause the core to turn brown.

3A and 3B are quality categories applied by LION and are not FATG approved