GD2

GD2 designates a coated secondary fibre board, insert and back grey
(chromo duplex board), top side wood-free white or slightly wood-containing white, with special volume (< 1.45 cm³/g, > 1.3 cm³/g).

Front top layer = hf or slightly hh white
Inlay = grey
Back cover layer = grey

hf white: wood-free white layer of bleached pulp with a maximum of 5% mechanical pulp

slightly hh white = slightly woody white layer of bleached pulp with a maximum of 30% mechanical pulp

grey = layer of recycled pulp (reused cellulose and groundwood fibres)

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