成人教育av久草_91超碰国产在线_99超碰在线播放_91精品观看在线_92精品观看在线_老司机成人网日韩_夜婷婷五月天导航_国产人妖网站大全免费在线观看

News Center

news

Location:Home > News Center

The Origin and Development of Papermaking

Release time:2019-04-01 Clicks:869

  Papermaking is a unique term for ancient Chinese paper-making skills. It is also an outstanding contribution made by the Chinese nation to human society. Paper is not a natural substance, but an artificial substance. The birth of paper has had a tremendous impact on world culture and civilization.

  Paper made by the paper-making technology invented by our country is manually processed, so it is called hand-made paper. When this kind of paper has become popular and spread in China, Europeans only know how to use "pen" (or goose feather tube) to draw words on mud, papyrus and sheepskin. Therefore, people call Chinese handmade paper Chinese paper, and we used to call it "earth paper".

  Since the Ten Years of Tianbao in Tang Dynasty (A.D. 751), Chinese papermaking spread westward through Arabs, and then to Spain in A.D. 1150, there has been handmade paper from European countries. It wasn't until 1799 that the paper machine ("endless mesh belt") was created, which opened a new chapter in the history of paper making. European paper refers to machine paper made from paper machines. Later, it was called "foreign paper" (as the Japanese call it). Therefore, from the end of the 18th century, papermaking has been divided into two stages, one is Chinese papermaking and the other is European papermaking.

  In terms of paper-making technology, the basic principles of hand-made paper and machine-made paper are the same, but there are differences in production process and operation methods. After the introduction of Chinese hand-made paper to Europe, Europeans from the imitation process felt that the physical consumption is high, coupled with the European population is small, the labor force is insufficient and the growing demand for paper and other reasons. So they tried every means to replace manpower with machines and power. Afterwards, under the influence of objective conditions, through continuous efforts, papermaking machines and pulping equipment were invented. From then on, papermaking was divided into two different systems: pulping and papermaking.

  From this we can see that manual papermaking is often called papermaking, while machine papermaking is called papermaking technology. Definition, fabrication and product performance are not exactly the same.


  • map
    查看地圖
  • 13523219518
    咨詢熱線
  • message
    短信咨詢
  • 伊人春色亚洲黄色| sese国产视频| 熟女 乱伦 亚洲| 精品国产欧美一区二区三区四川| AV卡通动漫亚洲| 国产伊人亚洲七七久久久桃花影院| 最新无码中文AV| 亚洲精品一区导航| 国产AV成人精品| 蜜臀AV在线入口| 陕西成人免费毛片| 夜夜爽天天狠狠九月婷婷| 男女性爱潮吹影院| 日本午夜羞羞视频| 美国成人无码一区| 狠狠躁日日躁夜夜老牛传媒| 国产综合视频导航| 私库久久精品视频| 久久青草在线视频| 骚气主播偷拍久久| 一区二区三区激情| 国产激情五月四射| 亚洲孕妇一级毛片| 视频一区精品干日本少妇首页| 裸体女级免费网站| 精品无码免费| 亚洲天堂日韩人妻| 97人妻超碰| 绝色日本中出视频| 人妻中文字幕专区| 亚洲成人电影中文字母不卡| aaa青春无码| 91网站在线播放| 囯产美女裸体网站| 欧州久久三级视频| 国产精品影视一区| 美国无码群交在线| ab在线se视频| 狠狠操狠狠爽黑白配视频| 欧美熟女另类激情| 天堂久久伊人精品|

    <li id="xefwx"><legend id="xefwx"><ruby id="xefwx"></ruby></legend></li>