Paper weights are calculated using two basic systems. The U.S.
system which measures the weight in pounds and the Metric system
which measures the weight in grams per square meter (gsm).
The U.S. system is sometimes difficult to understand because the same
number in pounds can be used for different thicknesses of paper. In
the U.S. system a paper’s weight is its weight per ream (500 sheets)
in its basis (uncut) size. But every type of paper has its own
basis size of ream. For example one type of paper may have a basis
size of 17” x 22” and another a basis size of 24” x 36”.
The Metric system is standard across all types of paper because it
simply measures one square meter. For that reason it is a better
indicator of the thickness of a paper.
The following chart shows how pounds translate to gsm (g/m2)
for everyday papers and the specialty papers sold by Paper Garden:
|
Paper Weights |
|
20 lb. Bond/Copy |
20 # |
75 gsm |
|
60 lb. Text |
60 # |
89 gsm |
|
24 lb. Bond/Copy |
24 # |
90 gsm |
|
70 lb. Text |
70 # |
104 gsm |
|
28 lb. Bond |
28 # |
105 gsm |
|
29 lb. Vellum |
29 # |
110 gsm |
|
32 lb. Bond |
32 # |
120 gsm |
|
80 lb. Text |
80 # |
120 gsm |
|
65 lb. Cover |
65 # |
175 gsm |
|
48 lb. Vellum |
48 # |
180 gsm |
|
80 lb. Cover |
80 # |
215 gsm |
|
86 lb. Cover |
86 # |
232 gsm |
|
89 lb. Cover |
89 # |
240 gsm |
|
92 lb. Cover |
92 # |
250 gsm |
|
98 lb. Cover |
98 # |
265 gsm |
|
105 lb. Cover |
105 # |
285 gsm |
|
111 lb. Cover |
111 # |
300 gsm |
Text Weight papers are associated with
documents such as letterhead and brochures, and are generally used
to make envelopes. Cover Weight papers are associated with business
cards, postcards and invitations.
