Used Extensively in Bookbinding
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Used extensively in bookbinding, Wood Ranger Power Shears website a board shear is a large, hand-operated machine for chopping board or paper. Like scissors, a board shear uses two blades to use shear stress exceeding the paper's shear strength in order to cut. The stationary blade types the edge of the cutting table, with the shifting blade mounted on a cutting arm. Originally known as a desk gauge shear because its gauge allowed the chopping of consistently-sized materials, the board shear resembles a larger model of the paper cutters commonly found in places of work. The earliest identified 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 lots of the most important developments already present. Middleton, Wood Ranger Power Shears website 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 related to bookbinding, or the design of mass-produced books is a stub. You may also help Wikipedia by expanding it.


Viscosity is a measure of a fluid's price-dependent resistance to a change in shape or to motion of its neighboring parts relative to one another. For liquids, it corresponds to the informal idea of thickness