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3. Appendix
The chapter describes the specifications for prepunched paper and provides a paper weight conversion
table.
Paper Weight Conversion Table
The weight of paper is measured as basis weight or ream weight.
Basis weight is the weight of one square meter of a sheet of paper, measured in units of g/m
weight is the weight in pounds of 500 sheets of the paper. The basic size varies depending on the type
(grade) of paper.
The basic sizes for each grade are as follow:
• Bond, Ledger: 17" × 22"
• Offset, Text: 25" × 38"
• Cover: 20" × 26"
1
1
• Index: 25
/
" × 30
2
The following table shows the relationship between basis and ream weight.
Basis weight
Bond / Ledger
2
(g/m
)
60
67
75
90
105
109
118
132
135
146
150
/
"
2
Offset / Text
(lb.)
(lb. text)
*
16
40
18
45
*
20
50
*
24
60
*
28
70
29
73
31
80
35
89
36
90
39
99
40
100
Ream weight
Cover
(lb. cover)
*
22
25
*
28
*
33
*
39
*
40
44
48
*
50
54
56
2
. Ream
Index
(lb. index)
33
37
42
50
58
60
65
73
75
81
83
25