Material is available in four subgrades
Freeness 60 gr. SR under Shopper-Riegler
Breaking length, km, not less 7,8
Folding strength, not less 800
Brightness, %, not less 86
Dirt count, pieces of specks per 1 m2
0,1-1,00 mm2, not more 70
1,0-2,00 mm2, not more 2
5,5-7,0
Moisture content, %, not more 20
HB-4
Freeness 60 gr. SR under Shopper-Riegler
Breaking length, km, not less 7,4
Folding strength, number of double folds, not less 700
Brightness, %, not less 87
Dirt count, pieces of specks 1 m2
0,1-1,00 mm2, not more 60
1,0-2,00 mm2, not more 2
5,5-7,0
Moisture content, %, not more 20
HB-5
Freeness 60 gr. SR SR under Shopper-Riegler
Breaking length, km, not less 8,5
Folding strength, number of double folds, not less 1000
Brightness, %, not less 82
Dirt count, pieces of specks per 1 m2
0,1-1,00 mm2, not more 90
1,0-2,00 mm2, not more 2
5,5-7,0
Moisture content, %, not more 20