Learning Center
Let's End the Confusion
In an effort to help eliminate the "Paper Weight" confusion problem,
we have compiled the comprehensive table listed below.
Now you can compare various types of paper and their "Equivalent Weights."
Definitions:
- Basis Weight
The basis weight of a paper is the designated fixed weight of 500 sheets,
measured in pounds, in that paper's basic sheet size.
It is important to note that the "basic sheet size" is not the same
for all types of paper.
- Caliper
Caliper refers to the thickness of a sheet of paper expressed
in thousandth of an inch. This measurement is taken with a micro meter.
Normally, paper caliper should not have more than a + or - 5% variance
within a sheet. Generally, the relation between caliper and basis weight ....
the greater the caliper (the thicker the paper), the greater the paper weight.
- Equivalent Weight
While different paper types have different basic sizes,
papers can still be compared by using equivalent weight.
Basis Weight ("Category") Table
| Type Paper |
Basic Size - 500 Sheets |
|
"Bond"
Ledger
Mimeo
Duplicator
Rag Paper
|
17" x 22" |
"Offset"
Book
Text
Coated Paper
|
25" x 38" |
"Cover"
|
20" x 26" |
"Tag Stock"
|
24" x 36" |
"Index"
|
25-1/2" x 30-1/2" |
The Values in the table below are intended to serve as a guide only.
They should not be used as specifications because there are variances
within the same basis weight due to other characteristics of the papers.
Similar weight papers may vary between different paper manufacturers.
|
--
Bond
Ledger
|
-
Offset
Text
|
-
Cover
-
|
--
Tag
--
|
-
Index
-
|
-
Points
-
|
-
*Caliper
(inches)
|
--
millimeters
--
|
-
Metric
(grams/sq meter)
|
| Equivalent |
16 |
40 |
22 |
37 |
33 |
3.2 |
.0032 |
0.081 |
60.2 gsm |
| Weight |
18 |
45 |
24 |
41 |
37 |
3.6 |
.0036 |
0.092 |
67.72 gsm |
|
20 |
50 |
28 |
46 |
42 |
3.8 |
.0038 |
0.097 |
75.2 gsm |
|
24 |
60 |
33 |
56 |
50 |
4.8 |
.0048 |
0.12 |
90.3 gsm |
|
28 |
70 |
39 |
64 |
58 |
5.8 |
.0058 |
0.147 |
105.35 gsm |
|
29 |
73 |
40 |
62 |
60 |
6 |
.0060 |
0.152 |
109.11 gsm |
|
31 |
81 |
45 |
73 |
66 |
6.1 |
.0061 |
0.155 |
116.63 gsm |
|
35 |
90 |
48 |
80 |
74 |
6.2 |
.0062 |
0.157 |
131.68 gsm |
|
36 |
90 |
50 |
82 |
75 |
6.8 |
.0068 |
0.173 |
135.45 gsm |
|
39 |
100 |
54 |
90 |
81 |
7.2 |
.0072 |
0.183 |
146.73 gsm |
|
40 |
100 |
56 |
93 |
83 |
7.3 |
.0073 |
0.185 |
150.5 gsm |
|
43 |
110 |
60 |
100 |
90 |
7.4 |
.0074 |
0.188 |
161.78 gsm |
|
44 |
110 |
61 |
102 |
92 |
7.6 |
.0076 |
0.193 |
165.55 gsm |
|
47 |
120 |
65 |
108 |
97 |
8 |
.0078 |
0.198 |
176.83 gsm |
|
53 |
135 |
74 |
122 |
110 |
9 |
.0085 |
0.216 |
199.41 gsm |
|
54 |
137 |
75 |
125 |
113 |
9 |
.009 |
0.229 |
203.17 gsm |
|
58 |
146 |
80 |
134 |
120 |
9.5 |
.0092 |
0.234 |
218.22 gsm |
|
65 |
165 |
90 |
150 |
135 |
10 |
.0095 |
0.241 |
244.56 gsm |
|
67 |
170 |
93 |
156 |
140 |
10.5 |
.010 |
0.25 |
252.08 gsm |
|
72 |
183 |
100 |
166 |
150 |
11 |
.011 |
0.289 |
270.9 gsm |
|
76 |
192 |
105 |
175 |
158 |
13 |
.013 |
0.33 |
285.95 gsm |
|
82 |
208 |
114 |
189 |
170 |
14 |
.014 |
0.356 |
308.52 gsm |
|
87 |
220 |
120 |
200 |
180 |
15 |
.015 |
0.38 |
312 gsm |
|
105 |
267 |
146 |
244 |
220 |
18 |
.0175 |
0.445 |
385.06 gsm |
The darker colored boxes above represent the
"most common paper weights" for that category.
Normal paper manufacturing tolerance within a
paper production run is + or - 5% to 7% caliper
This Table was compiled by Micro Format, Inc.
Copyright 1997-2007 Micro Format, Inc.
This table may be duplicated with permission from Micro Format, Inc.
International Metric Paper Sizes - ISO Standard
SIZE
|
WIDTH (mm)
|
HEIGHT (mm)
|
WIDTH (in.)
|
HEIGHT(in.)
|
| A0 |
841 mm |
1,189 mm |
33.11 in. |
46.81 in. |
| A1 |
594 mm |
841 mm |
23.39 in. |
33.11 in. |
| A2 |
420 mm |
594 mm |
16.54 in. |
23.39 in. |
| A3 |
297 mm |
420 mm |
11.69 in. |
16.54 in. |
| A4 |
210 mm |
297 mm |
8.27 in. |
11.69 in. |
| A5 |
148 mm |
210 mm |
5.83 in. |
8.27 in. |
| A6 |
105 mm |
148 mm |
4.13 in. |
5.83 in. |
| A7 |
74 mm |
105 mm |
2.91 in. |
4.13 in. |
| B0 |
1,028 mm |
1,456 mm |
40.48 in. |
57.32 in. |
| B1 |
728 mm |
1,028 mm |
28.66 in. |
40.48 in. |
| B2 |
514 mm |
728 mm |
20.24 in. |
28.66 |
| B3 |
364 mm |
514 mm |
14.33 in. |
20.24 in. |
| B4 |
257 mm |
364 mm |
10.12 in. |
14.33 in. |
| B5 |
182 mm |
257 mm |
7.17 in. |
10.12 in. |
| B6 |
128 mm |
182 mm |
5.04 in. |
7.17 in. |
HELPFUL GUIDELINES for PAPER USAGE
- Prior to use, paper should be allowed to acclimate at least
48 Hours in the environment in which it will be used.
Optimum storage facility would retain temperatures between 70-80 degrees F
with 50% relative humidity.
- Before loading paper, fan the sheets on all four sides.
This creates a small layer of air between the sheets which should help
feeding mechanisms.
Copyright ©
2007-2008 Micro Format, Inc.
All Rights Reserved
Micro Format, Inc. ~ 830-3 Seton Court Wheeling, IL 60090
Phone: 847/961-5330 ~ In USA Toll Free 866-561-5511
e-mail support@secureguardpaper.com
|
