In China, the invention of paper is attributed to the eunuch Cai Lun of the Han Dynasty (about A.D. 105; editor's note of the Chinese Edition: recent historical research shows that this time will be pushed forward). At that time, paper was made from bamboo roots, rags, hemp and other raw materials. The manufacturing process was to smash these things, boil them, filter them, spread the residue and dry them in the sun. The manufacture and use of paper gradually spread to the northwest along with the business activities of the silk road. In 793 A.D., a paper mill was built in Bagdad, Persia. Papermaking spread from here to the Arab countries, first to Damascus, then to Egypt and Morocco, and finally to exelovia, Spain. In 1150, the moors built the first paper mill in Europe. Later, he established paper mills in Hollande, France in 1189, valbraiano, Italy in 1260, and Germany in 1389. Since then, a London businessman named John tent in England began to make paper in 1498 under King Henry II. In the 19th century, paper made from rags and plants was basically replaced by paper made from plant pulp. Different from parchment, paper is relatively cheap and can be produced in large quantities and quickly, which is very important for the printing of books. The first printed book is the Gutenberg Bible published in Germany in 1457, which commemorates Johannes Gutenberg. The goldsmith from Mainz invented the first flexible type printing board.
Classification by raw materials of paper making
Waste newspaper: this kind of waste paper is mainly used for the production of recycled newsprint plate, and can also be used for the production of household paper, general cultural paper or general printing paper. White newspaper: this kind of waste paper belongs to high-grade waste paper, which can be used to produce recycled newsprint, high-grade cultural paper or high-grade printing paper.
Waste magazines: this kind of waste paper mainly includes the books that are not published or recycled by printing factories or bookstores, and the waste publications and books that do not contain or only contain a small amount of mechanical pulp. This kind of waste paper is deinked to remove color and ink. It can be used to produce glossy paper, writing paper, relief paper, toilet paper and other color management products. It can also be used to produce paperboard or mixed in newsprint. White paper edge of publications: this kind of waste paper belongs to post industrial waste paper, mainly the white paper edge cut by the printing factory, and a small part is the unprinted and written mortar paper of organs and schools. White paper edge is an ideal substitute for pulp. It can replace the packaging container of bleached pulp and be used to produce high-grade cultural paper. Therefore, this kind of waste paper can also be used directly. Waste kraft paper: this kind of waste paper is post consumer waste paper, mainly refers to waste kraft paper and waste paper bag paper. This kind of waste paper can be recycled as striped wrapping paper after stitching. Waste corrugated box: this kind of waste paper includes corrugated board and corrugated box, etc. This kind of waste paper can be used for cardboard, corrugated base paper and so on. Among them, bamboo pulp waste paper and wood pulp waste paper can also be used to produce vermicelli board. Waste packaging paperboard: this kind of waste paper includes non corrugated paperboard and carton, etc. this kind of waste paper can be recycled for the production of paperboard. Office waste paper: this kind of waste paper mainly includes used computer printing paper, electrostatic copy paper, fax paper and other office paper. With the increasing modernization of office equipment, the amount of office waste paper is increasing year by year, so office waste paper has become a new kind of waste paper with great potential. Mixed waste paper: this kind of waste paper is left after sorting, unclassified waste paper digital printing machine, but the impurities should be removed as far as possible. Mixed waste paper is a kind of low-grade waste paper, including a part of waste paper, in which there are waste newspapers, waste magazines, waste books, waste exercise books, office waste paper, advertising color pages, shredded paper and packaging materials. It is mainly used for making felt base paper, wallpaper, moisture-proof paperboard and other low-grade paperboard.
The use of various kinds of paper
Toilet paper: mainly used in daily life (including napkin, handkerchief, facial tissue, etc.)
Cardboard, corrugated paper: mainly used for packaging cartons, used as bobbins, etc.
Cultural paper, news paper: widely used in offset printing books, textbooks, covers, illustrations, color pictures, etc.
Writing paper: mainly used for exercise books, notebooks and other writing paper, also used for printing books, magazines, etc.
