The evolution of the paper
By David Mauricio Ramírez Aristizábal.
Cai Lun invented the paper, this man of Chinese origin lived in the court of the Han dynasty and is traditionally regarded as the inventor of paper, and that under his administration the manufacturing technique was refined material
¿When was it created?
between 77 and 110 or, according to other sources, between 50 and 121
What material is made?
This consists of a thin sheet made from cellulose pulp, a slurry of ground plant fibers suspended in water, generally bleached, and then dried and hardened
Material made from crushed and bleached pulp plant is arranged in thin sheets and used to write, draw, etc
1. properties Scene: Laid, beads and beards
2. body features: weight and thickness
3. Characteristics and Identification Marks: filigree ring Muller and dry
4. Quality features implies the permanence in time: whiteness, PH (alkaline reserve)
Types of paper
Vegetable parchment paper
¿What are they used?
Paper is always present in our daily lives. It is said that every human being will consume 13 trees throughout their lives for different products you need: diaper newborn, toilet paper, notebooks to study the blocks to draw the agendas for scoring, books to read, newspapers etc.
Types of paper
1.Papeles para corrugar, se utilizan para fabricar las típicas cajas de color café con que se embalan televisores, electrodomésticos, productos para el hogar y principalmente fruta de exportación, vinos, salmones, etc.
2.Papeles de impresión y escritura, como su nombre lo indica, son de uso diario en colegios y oficinas; su color usualmente es blanco. El papel típico es el de tus cuadernos escolares.
3.Cartulinas, se emplean para fabricar los envases de pasta dental, perfumes, detergentes, de los cereales para el desayuno, de la leche líquida de larga vida, etc.
4.Papel para periódico, en estos papeles se imprimen los diversos periódicos que circulan a diario por todo el país.
Evolution of the paper
Throughout all time, the paper has been the material most widely used by men to draw and write two rasgosdiferenciales the degree of civilization of humans with respect to other components of nature. The appearance of the paper was forced by the need for a new transmission support Infomessages readily available, handling and storage, clear advantages that the role has on other media as formerly stone slabs and building surfaces.
It is believed that lainvención writing and numbering were induced by the need to inventory and account stored surplus crops in good times and in primitive agricultural culturassedentarias of Mesopotamia, but not until 3000 BC when it is estimated to be discovered by the Egyptians of the technique for obtaining sheets of crude fiber, lascuales could be used for writing. These sheets were made from a plant that grew on the banks of the River Nile
The evolution in the different working quehoy led to what is an almost emblematic product for our society and, of course, for our culture. Now the paper is made from various systems, such as the use of vegetales.Asimismo fibers, the appearance of the dye allowed a welcome diversity in the supply of both colors and textures. Moreover, it is now possible to replace these synthetic character pormateriales thin sheets, although this does not mean they are losing popularity or use in our daily life.