Editing Paperboard (section)

==Grades==
The [[Deutsches Institut für Normung|DIN]] Standard 19303 "Paperboard - Terms and grades" (Publication date : 2005-09) defines different grades of paperboard based on the surface treatment (first letter), the main furnish (second letter) and the colour (non-D grade) or bulk (D grade only) (numbering).

{| class="wikitable"
|-
! First letter<br>(surface treatment)
! Second letter<br>(main furnish)
! Number
|-
|
* A = cast-coated
* G = pigment coated
* U = uncoated
| 
* Z = bleached virgin chemical pulp
* C = virgin mechanical pulp
* N = unbleached virgin chemical pulp
* T = recycled/secondary fibre with white, cream or brown reverse
* D = recycled/secondary fibre with grey back
|
All except D grades:
# white reverse side
# cream reverse side
# brown reverse side

D grades only:
# bulk ≥ 1.45&nbsp;cm<sup>3</sup>/g
# 1.3&nbsp;cm<sup>3</sup>/g&nbsp;< bulk <&nbsp;1.45&nbsp;cm<sup>3</sup>/g
# bulk ≤ 1.3&nbsp;cm<sup>3</sup>/g
|}

'''Example:''' GC1 would be a "pigment coated", "virgin mechanical pulp" board with a "white reverse side". Often the used paperboard type would be FBB, which was coated on both sides.