Understanding and Specifying Paper Thickness
Which paper is thicker: 28-pound (28#) bond/writing paper or 50# uncoated offset stock? It may seem counterintuitive, but the 28# bond is thicker!
Why? The key is understanding the standard size for a given type of paper, which is used to calculate a paper's basis weight. Basis weight is the weight, measured in pounds, of 500 sheets (a ream) of paper cut to a standard size for a given type of paper. In the case of 28# bond, the standard sheet size is 17" x 22". The 50lb offset paper has a standard sheet size of 25" x 38".
C1S and C2S are heavy card stocks referred to by "points", and are sold by thickness rather than weight. The numbers 1 and 2 refers to the coating of either one or two sides.
Paper is manufactured to either weight (i.e. 80lb Cover), or to thickness - such as (i.e. 12 point C1S or C2S or 9 point Reply Card).
This means that the thickness of 80lb Cover - from one brand or production run to the next - may vary slightly. Conversely, paper that is manufactured to thickness, may vary slightly in weight when comparing one brand to another, which can affect shipping costs.
Dull paper weighs the same as gloss paper but is thicker: That's because gloss paper is more calendared to give it the glossier finish. Calendaring is running the paper through steel rollers to give paper it's final finish.
Your project's requirements should determine how you specify paper for projects. For example, a card might require a minimum thickness of 9pt stock for mailing.
If weight or thickness of stock is critical to a specific project, be sure to find out exactly what it is from your Holland Litho print rep or your favorite paper rep.
So Why Is 80lb Cover Thicker Than 80lb Text?
It's all in the sheet size!
80lb cover is weighed based on 500 20" x 26" sheets, whereas the weight of 80lb text is based on 500 sheets with a sheet size of 25" x 38".
To determine equivalent thickness, use the chart below to convert between paper types.
Weight and Thickness Equivalents for Paper Stocks
|Coated Text Gloss|
|Coated Text Dull|
|Coated Cover Gloss|
|Coated Cover Dull|