Used extensively in bookbinding, a board shear is a large, hand-operated machine for reducing board or Wood Ranger official paper. Like scissors, a board shear makes use of two blades to use shear stress exceeding the paper's shear Wood Ranger Power Shears USA so as to cut. The stationary blade types the edge of the cutting desk, with the shifting blade mounted on a cutting arm. Originally generally known as a table gauge shear because its gauge allowed the reducing of consistently-sized materials, Wood Ranger official the board shear resembles a larger model of the paper cutters commonly present in workplaces. The earliest identified reference to a board shear comes from an 1842 complement to Penny Magazine, titled A Day at a Bookbinder's, which included a drawing of a board shear with many of the major 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 artwork out of books, the arts associated to bookbinding, or the design of mass-produced books is a stub. You might help Wikipedia by expanding it.

Viscosity is a measure of a fluid's fee-dependent resistance to a change in shape or to motion of its neighboring parts relative to each other. For liquids, it corresponds to the informal concept of thickness