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Some are mechanical and some are chemical. There is naturally some overlap with printing processes and photographic processes, but the challenge of precisely duplicating business letters, forms, contracts, and other paperwork prompted some unique solutions as well. There were many short-lived inventions along the way.
A sheet of carbon paper is placed between two or more sheets of paper. The pressure applied by the writing implement (pen, pencil, typewriter or impact printer) to the top sheet causes pigment from the carbon paper to reproduce the similar mark on the copy sheet(s). More than one copy can be made by stacking several sheets with carbon paper ...
Carbonless copy paper (CCP), non-carbon copy paper, or NCR paper (No Carbon Required, taken from the initials of its creator, National Cash Register) is a type of coated paper designed to transfer information written on the front onto sheets beneath.
[citation needed] A4 ("metric") paper is easier to obtain in the US than US letter can be had elsewhere. [citation needed]. The ISO 216:2007 is the current international standard for paper sizes, including writing papers and some types of printing papers. This standard describes the paper sizes under what the ISO calls the A, B, and C series ...
There have been some experimental uses of carbon paper in art: as a surface for painting and mail art (to decorate envelopes). Carbon paper is commonly used to transfer patterns onto glass in the creation of stained glass. [7] Carbon paper disks are still used in school physics labs as part of experiments on projectile motion and position. [8]
Sample article layout (click on image for larger view) This guide presents the typical layout of Wikipedia articles, including the sections an article usually has, ordering of sections, and formatting styles for various elements of an article. For advice on the use of wiki markup, see Help:Editing; for guidance on writing style, see Manual of ...
A printer in Leipzig inspecting a large forme of type on a cylinder press in 1952. Each of the islands of text represents a single page. The darker blocks are images. The whole bed of type is printed on a single sheet of paper, which is then folded and cut to form many individual pages of a book.
Copy paper is used for copying and laser printers. The basis weight is 70-90 g/m 2 (approximately 18-24 lb) and ISO brightness 80-96%. It is made of 90–100% virgin chemical pulp or 100% deinked pulp with total pigment content of 10-15%. The most important quality is smooth run in a copying machine / printer and good dimensional stability.