Brief History
If we have to talk about the role we have to go back to AD 105 the country of China , Mr. T'sai Lun, which was an employee of the Chinese emperor Ho Ti, first manufactured paper was made from vegetable paste, ie based on bamboo fiber, mulberry and other plants, and this is how we know the role today. For 500 years the technique of papermaking belonged only to the Chinese, who kept it for that long period. In ancient Egypt was written on papyrus (from which the word paper), which was derived from the stem of a plant very abundant on the banks of the Nile (Cyperus papyrus).
In Europe during the Middle Ages was used was parchment skins of goats or sheep, tanned, ready to receive the ink, which unfortunately were quite expensive, which caused from the eighth century popularization of the unfortunate habit of deleting text of the scrolls to overwriting (giving rise to the palimpsest) thus lost an inestimable amount of work.
papermaking today
Paper is a thin sheet is made of cellulose fiber plant mainly comes from trees, cotton, and wood in general that are milled, bleached diluted in water, then dried and hardened, the pulp usually substances are added as polypropylene or polyethylene to provide different characteristics. The fibers are bonded by hydrogen bond links. Also called paper, foil or foil to most common way thin.
The paper quality also depends on the fibers we use, the best are often the cotton to be more long and tough, can also be a mixture of new fibers, and a portion recycled boxes, and even clothing cotton.
finished paper and contains cellulose, and glue, to make the fibers stick together, the process uses exorbitant amounts of water so it is better to recycle them.
But the use of new technology and especially rapid growth in computing and new telecommunications systems that allow the writing, storing, processing, transportation and books with electronic media more advantageous, showing the traditional use of paper in the communication and information, background.
finished paper and contains cellulose, and glue, to make the fibers stick together, the process uses exorbitant amounts of water so it is better to recycle them.
But the use of new technology and especially rapid growth in computing and new telecommunications systems that allow the writing, storing, processing, transportation and books with electronic media more advantageous, showing the traditional use of paper in the communication and information, background. 
0 comments:
Post a Comment