PURPOSE
Printing of newspapers and other publications by offset and other printing methods

(TC BY 790282162.018-2018)

Name of indicators and unit of measurement
Grade О
Grade B
Grade U
Normative value
Average actual value
Normative value
Average actual value
Normative value
Average actual value
Paper weight with an area of 1sq.m., g
45,0+1,5(-2,0)
48,8±2,0
50,0±2,0
52,0±2,0
45,0±2,5
48,8±2,5
50,0±2,5
52,0±2,5
45,0±3,0
48,8±3,0
50,0±3,0
52,0±3,0
Density, g/cm
at least 0,57
0,58-0,61
at least 0,55
0,55-0,59
at least 0,53
0,53-0,59
Breaking length in the machine direction, m
at least 3400
3800-4200
at least 3000
3500-4000
at least 2800
3200-3800
Absolute tear resistance in the transverse direction, mN
at least 186
220-240
at least 176
200-230
at least 176
190-230
Smoothness on each side, s
at least 35
40-50/35-45
at least 30
35-45/30-40
–
35-45/30-40
Whiteness, %
at least 57
59-61
–
55-61
–
55-61
Non-transparency, %
at least 93
94-95
at least 92
93-95
at least 91
93-95
Degree of impurity- the number of specks per area of 1sq.m.:
– from 0.5 to 1.5 sq.m.;
– from 1,5 to 2,0 sq.m.;
– more than 2,0 sq.m.

⩽75
⩽8
0

⩽50
0
0

–
⩽20
0

⩽60
⩽1
0

–
–
⩽20

⩽80
⩽2
0
Humidity, %
8,0±2,0
7,5-8,5
8,0±2,0
7,5-8,5
8,0±2,0
7,5-8,5

✔ On the surface of paper O, B grades no folds, wrinkles, glossy stripes, transparent spots and holes that are visible to the naked eye are allowed  On the surface of U grade paper holes visible to the naked eye are not allowed.
✔ Subtle folds, wrinkles, glossy stripes, transparent spots and holes that can not be detected in the manufacturing process, are allowed if the index of these intra-roll defects does not exceed for O grade paper grade -2.0%, for B grade paper -2.5%, for U grade paper -5%.
✔ It is possible to produce newsprint paper according to State Standard GOST 6445-74

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