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A sheet of carbon paper, with the coating side down Handwriting duplicated through carbon paper. Carbon paper (originally carbonic paper) consists of sheets of paper that create one or more copies simultaneously with the creation of an original document when inscribed by a typewriter or ballpoint pen. The email term cc which means ‘carbon ...
Tracing paper is paper made to have low opacity, allowing light to pass through.It is named as such for its ability for an image to be traced onto it. The modern version of tracing paper was developed for architects and design engineers to create drawings which could be copied precisely using the diazo copy process.
Onionskin or onion skin is a thin, lightweight, strong, often translucent paper, [1] named for its resemblance to the thin skins of onions. [2] It was usually used with carbon paper for typing duplicates in a typewriter, for permanent records where low bulk was important, or for airmail correspondence. [3]
The copies were often paper of different colors (e.g., white original for customer, yellow copy for supplier's records, and other colors for subsequent copies). Stationery with carbonless copy paper can be supplied collated either in pads or books bound into sets, or as loose sets, or as continuous stationery for printers designed to use it.
The first is the exposure area, where the sandwich of the two sheets (the master and the diazo paper) passes in front of an ultraviolet lamp. Ultraviolet light penetrates the original and neutralizes the light-sensitive diazonium salt wherever there is no image on the master. These areas become the white areas on the copy.
Ralph Wedgwood (1766–1837) was an English inventor and member of the Wedgwood family of potters. His most notable invention was the earliest form of carbon paper, a method of creating duplicate paper documents, which he called "stylographic writer" or Noctograph.