13025AW: Re: [PPLetterpress] vandercook
- Mar 3, 2012I think that he means heavy Bristol, it comes in 230
Lb. basis weight.
The basis weight is a term used to describe the weight
in pounds of 500 sheets of paper (one ream) of a particular
measured size of sheet. Since the sheet size varies
from one type of stock to another, the basis weights
are not always easily comparable.
For example, an office supply store has 8.5 x 11 size
cover stock (80 lb Printing Bristol) and 8.5 x 11 size
card stock (90 lb Index) side by side on the shelf. Both
papers are manufactured by the same company, and
a basis weight comparison indicates the card stock
(90 lb Index) is heavier than the cover stock(80 lb
Printing Bristol). In this example, the cover stock (80
lb Printing Bristol) is actually heavier than the card
stock (90 lb Index).
The reason the cover stock is heavier is because before
the two types of paper were cut into 8.5 x 11 size pages,
the card stock was a larger sheet size than the sheet size
of the cover stock. When the papers were cut during the
manufacturing process into 8.5 x 11 size pages, more reams
(500 sheets) of paper were received from the card stock sheets
than from the cover stock sheets. This makes the weight
of the cover stock heavier than the weight of the card
It is easier to compare the cover stock metric weight
(g/m2) against card stock metric weight (g/m2). If
you look at the metric weights of the two stocks in
the previous example, it is immediately evident
that 80 lb Bristol cover stock (176 g/m2) isheavier
than 90 lb Index card stock (163 g/m2).
The sheet size used to determine the basis weight of
Printing Bristol is 22.5x35" , and the sheet size for
the basis weight of Index Bristol is 25.5x30.5". Interestingly
enough both numbers result in the same number
for a basis weight. The sheet size to determine the basis
weight of Cover stock is 20x26".
quam minimum credula postero!
Odes Book I
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