This quantity is commonly called grammage in both English and French ISOthough printers in most English-speaking countries still refer to the " weight " of paper. Typically grammage is measured in paper mill on-line by a quality control system and verified by laboratory measurement. Basis weight[ edit ] In countries that use US paper sizes, a less direct measure known as basis weight is used in addition to or instead of grammage. The basis weight of paper is the density of paper expressed in terms of the mass of a ream of given dimensions and a sheet count.
Generally paper thickness is described by giving the weight in pounds of a ream of paper.
Unfortunately the basis sizes for a ream vary with the paper type, which means that two different kinds of paper can differ from each other in thickness, even if the same lb value is given on the packaging.
A ream of kraft paper consists of sheets of 24 inch by 36 inch basis size. Accidentally there is a relationship between the ream weight and the thickness in inch of a given kraft paper: The latter is the former divided by This is only a rule of thumb though, because two krafts can show differently dense material.
Most pyrotechnic sources refer to kraft paper thickness giving the pound values. Shell makers and other fireworks people frequently talk about e. Anything heavier than the 70 seems to be both rarely used and hard to find.
Some types of protective paper for use when painting are actually about a 60, and some other extra tough ones employed for the same use can even be However, the lb-inch system is popular in the english-speaking part of the world only.
Given the basis size of a ream of kraft and the lb-value, one can easily calculate gsm grams per square meter and vice versa. The paper weight in gsm turns out to be approx.
Thus, when knowing gsm the paper weight in lbs is about 0,59 times the gsm-value.
For everyone interested, here are the steps for calculating gsm when knowing lbs hopefully I did this properly: As the factors for the conversion lbs-grams are constants too, gsm turn out to be 1, times the lb-value of our kraft.If you'd like to see more paper options, check out our array of copy and printer paper, including more copy and multipurpose paper.
Pack Size Before making a paper selection, consider the amount of paper you use on a weekly or monthly basis. The estimated delivery time will be approximately 1 - 3 business days from the time of order.
The environmental impact of this much printing is mostly due to the costs of producing the paper, in proportion to the weight of the paper produced. Four-hundred reams of paper weigh one ton, and each ream contains sheets. Versatile: The Jog-Fast is able to hold a full ream of " x 11" paper or one half ream of 11" x 17".
Solid Construction: An isolation-mounted eccentric weight movement and self-aligning, oil-impregnated bearing help the Jog-Fast to provide consistent performance.
Paper merchants often quote the price of paper as a per-M cost rather than a per-ream cost. See the glossary in the next section to better understand the more complex question of basic sizes for different grades of paper.
Sheets sq. in or larger - ream weight calculated to nearest pound.
Sheets sq. in to sq in - ream weight calculated to nearest half pound. Sheets less than sq. in - ream weight calculated to nearest one hundredth of a pound.
CALCULATING M WEIGHTS As the ream weight is the weight of sheets, and the M weight is the weight of.