What is the copy paper for?

Bureaucracy arose thousands of years ago. Once during the archaeological excavations in Egypt, a huge number of clay tablets with the same text were found. The rewriting was then done by literate slaves.

For the first time, the technology by which copying paper began to be manufactured was patented on October 7, 1806 in the UK. The paper was two-sided, saturated with printing ink. The invention of the famous "copy" belongs to Ralph Wedgwood.

In the 1820s, carbon-based copying paper began to be produced commercially. The peak of its popularity came in the 70's, when the printing machines began to appear massively. The coating began to add mastic, which allowed to avoid the lack of the previous option - the contamination of everything to which it touched. Before the advent of modern copying equipment (copier, fax), the copier was very much in demand. Today it is not so popular and is used mainly in sewing.

The copy paper has a small density. On one side of it there is a painting layer, which helps to receive several copies at the time of writing, printing or drawing. The sheet is laid between ordinary paper with a color layer down. When writing on a sheet located on top, by pressing the handles, the ink particles pass to the sheet that is placed underneath the carbon paper.

With this paper, you can receive copies of various documents. Today, special materials for blueprinting are distributed, and there is also a variety of them intended for high-contrast pigeonholes.

Also now, there is photographic reflex paper for copies from bar-originals (single and double-sided) by way of contact copying. There were also photoshoot photosensitive materials (negative, positive) for obtaining copies from dashed and halftone originals by means of photocopying. Another type is a photocamera, which is used to obtain copies from bar-like originals using contact and projection printing. Also, thermoset copying paper is used for reflex replicating in thermal (infrared) beams and thermal transfer of images onto ordinary paper. The photopolymer photographic materials have a thin light-sensitive semiconductor layer on the surface based on zinc oxide.

Office copy paper, which can be bought in many stores, is characterized by high contrast images. The time to make a copy can be from a few seconds to a minute or more. By the technology of their processing (fixation, manifestation, etc.) and the duration of the storage of copies, there are also different kinds of paper.

Often, for the production of copies, ordinary paper that has not been processed is used, either with a contact or matrix-portable copying method, as well as when reproducing the original by means of operational printing capabilities.