papermaking造纸术

1、,The Four Great Inventions of Ancient China,Chinese ancient achievements in science and technology,1.,Science and technology,Chinese ancient astronomy calendar,1.,Science and technology,Ancient Chinese mathematics achievement:,1.Nine chapters of arithmetic九章算术 2. 周髀算经,1.,Science and technology,The a

2、ncient Chinese achievements in physics medicine geography architecture and so on.,The four great inventions were important symbols of Chinas role as a great world civilization.,2.,Influence to the world,Marx pointed out: Gunpowder blew up the knight(骑士) class Compass（罗盘） opened the world market and

3、set up colonies（殖民地） Printing is becoming protestant tools,2.,Influence to the world,The four great inventions in the European civilization gradually spread to the west before, become the necessary premise of “Bourgeois(资产阶级) development,Papermaking technology,4.,Development,Invented,2 century,105,P

4、opularize,3 to 4 century,Only writing material,Main inventor：,2.,Cai Lun,?121,Official,Killed by himself,The god of paper,What does it make of?,1.,Ancient raw material,Bark(树皮) Fishing net cloth hemp heads(麻头),3.,produce,There are four main steps I will introduce to you,3.,produce,First,Separation o

5、f raw material To use the retting leaching（沤浸） or cooking methods for raw materials in alkali（碱） degumming（脱胶）, and scattered into fibrous（纤维状）;,3.,produce,Second,Beating（打浆） Use the method of cutting and struck（捶捣） staple fiber, and make the fiber broom(帚化), and become the pulp(纸浆);,3.,produce,Thir

6、d,Manufacture paper with pulp（抄造） Namely make pulp water penetration into slurry, then used for paper pulp (woven bamboo mat) and get the pulp in paper to woven thin sheet of wet paper;,3.,produce,fourth,Dry Namely the wet paper to dry, peeling then became a paper.,4.,Spread,6th century: Korea 7th c

7、entury: Japan 8th century: Arab States and India 12th century: Europe and Africa 16th century: Amrica 19th century: Oceania,5.,Influence,It is a revolution of writing material. And it is easy to carry, the range is not constrained(强迫), driving the Chinese, Arab（阿拉伯人）, European and the worlds cultural development.,Paper-making is one of the four great inventions of China, the paper is the Han long experience accumulation