Question: I notice that some 80# cover stocks appear to feel heavier than others. If they are both the same weight, how do you account for the difference?
Answer: All 80# cover stock is not created equal. To accurately assess the bulk of any stock you need to know its caliper value. The caliper value is the thickness of a single sheet measured with a micrometer and reported in ml’s (thousandths of an inch). North American, European and Asian paper mills manufacture paper using slightly different processes and specifications. The finish of the coating will also affect the bulk of the paper. Dull coated sheets have greater bulk than gloss coated sheets. Matte coated sheets have greater bulk that both gloss or dull. If bulk is important on a particular print project be sure get the papers caliper value to understand its thickness relative to its weight.