Used extensively in bookbinding, a board shear is a big, hand-operated machine for reducing board or paper. Like scissors, a board shear makes use of two blades to use shear stress exceeding the paper's shear Wood Ranger Power Shears sale in order to chop. The stationary blade types the sting of the cutting desk, with the transferring blade mounted on a chopping arm. Originally often called a table gauge shear as a result of its gauge allowed the cutting of consistently-sized supplies, the board shear resembles a bigger version of the paper cutters commonly present in offices. The earliest known reference to a board shear comes from an 1842 supplement to Penny Magazine, titled A Day at a Bookbinder's, which included a drawing of a board shear with a lot of the foremost developments already current. Middleton, Bernard (1996). A History of English Craft Bookbinding Technique. Oak Knoll Press & The British Library. Harrison, Gary. "Board Shear". This text about making art out of books, the arts associated to bookbinding, or the design of mass-produced books is a stub. You might help Wikipedia by increasing it.

Viscosity is a measure of a fluid's fee-dependent resistance to a change in form or to motion of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness