Ricoh Pro 8120s Manuals - Page 27

Appendix, Paper Weight Conversion Table

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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/m2. Ream 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" • Index: 251/2" × 301/2" The following table shows the relationship between basis and ream weight. Basis weight (g/m2) 60 67 75 90 105 109 118 132 135 146 150 Bond / Ledger (lb.) 16 * 18 20 * 24 * 28 * 29 31 35 36 39 40 Ream weight Offset / Text (lb. text) Cover (lb. cover) 40 * 22 45 25 50 * 28 60 * 33 70 * 39 73 40 * 80 44 89 48 90 50 * 99 54 100 56 Index (lb. index) 33 37 42 50 58 60 65 73 75 81 83 25

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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
2
. Ream
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"
•
Index: 25
1
/
2
" × 30
1
/
2
"
The following table shows the relationship between basis and ream weight.
Ream weight
Basis weight
(g/m
2
)
Bond / Ledger
(lb.)
Offset / Text
(lb. text)
Cover
(lb. cover)
Index
(lb. index)
60
16
*
40
*
22
33
67
18
45
25
37
75
20
*
50
*
28
42
90
24
*
60
*
33
50
105
28
*
70
*
39
58
109
29
73
40
*
60
118
31
80
44
65
132
35
89
48
73
135
36
90
50
*
75
146
39
99
54
81
150
40
100
56
83
25