FATG Level 3
Mountboard Quality Level 3 (new level; was part of Standard). Often used names: White Core, White Core Plus.
Mountboards where all parts are made from 84% or higher alpha cellulose, lignin content < 0.65%, and/or cotton.
Facing paper may be <4 on BWS, or equivalent specified lightfastness test.
Presence of OBAs in facing and backing papers should be indicated. Colour may bleed. May not be used for Levels 1 or 2 framing. Can be used for Level 3 framing and below.
