Paper is a sieved fibre pulp of organic origin with a weight of 28 to 200 g/m². Manufactured by placing fibres on the sieve. The paper is produced in sheet or roll form. After the sieve mass has been formed, it is dehydrated, pressed, dried and smoothed out in split stages of the continuous manufacturing process.
Organic fibers usually used: cellulose fibers, fiber of wood pulp – obtained by starting and grinding pine logs (pulpwood) in the process of mechanical pulping. Sometimes chemical pulping is used and other vegetable fibres (straw, cane, cotton, flax, hemp, bamboo) are used. Recycled waste paper that has been previously dispersed is also used.
Organic paper is good for leaflets printing
In addition to organic fibres, the paper consists of non-fibrous matter – organic fillers: e. g. organic fillers. potato starch and inorganic mineral fillers: kaolin, talc, gypsum, chalk and sometimes chemical substances such as hydrosulfit and dyes. Fillers improve the properties of the paper (flotation, self-repair, opacity, whiteness, shade). The type of fibres, fillers and their proportions of use is determined by the paper formulation, depending on the type and purpose of the paper.
The history of paper in the world
The paper (according to Chinese chronicle) was invented in China by a carnival man at the court of Emperor He Di from the Han Dynasty, eunuch Cai Lun, around 105 AD. Kancelista experimented with tree bark, silk and even fishing nets until he came up with the right method (paper extracted) using silk rags and linen rags. Emperor He Di, in recognition of the importance of his invention, raised him to the dignity of the Minister of Agriculture.
However, the results of archaeological surveys show that the paper was already known earlier, at least in year 8 BC. This year comes a piece of paper with 20 Chinese signs found in the Nefrytowa Gate, a border guard of the Silk Road. Perhaps the paper is even older, its unsaved patches were found in positions probably dating back to the 2nd century BC, but this dating is uncertain. Cai Lun probably only invented the method of mass paper production.