Paperboard - Grades

Grades

The 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).

First letter (surface treatment)	Second letter (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): 1 = white reverse side 2 = cream reverse side 3 = brown reverse side (D grades only): 1 = bulk >= 1.45 cm³/g 2 = bulk < 1.45 cm³/g, > 1.3 cm³/g 3 = bulk <= 1.3 cm³/g

First letter
(surface treatment)

Second letter
(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):

1 = white reverse side
2 = cream reverse side
3 = brown reverse side

(D grades only):
1 = bulk >= 1.45 cm³/g
2 = bulk < 1.45 cm³/g, > 1.3 cm³/g
3 = bulk <= 1.3 cm³/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.

Famous quotes containing the word grades:

“There are no grades of vanity, there are only grades of ability in concealing it.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)

“He suggested that there might be men of genius in the lowest grades of life, however permanently humble and illiterate, who take their own view always, or do not pretend to see at all; who are as bottomless even as Walden Pond was thought to be, though they may be dark and muddy.”
—Henry David Thoreau (1817–1862)

“Kindliness seems to exist primarily as an animal instinct, so deeply rooted that mental degeneracy, which works from the top down, does not destroy it until the mind sinks to the lower grades of idiocy.”
—Charles Horton Cooley (1864–1929)