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【Discussion】anyone could tell me the reasons
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poyoro(金币+3): sweat 2011-03-10 21:17:36
| Congratulation! You find a good way to let the card be old. Did you remember the comic dialogue which was performed by five actors including Jiang Kun in the Spring Festival Gala organized by CCTV? According to suggestion from the expert on cultrual relic in the programe, you can bury the old cards under ground. The person who finds them in the future about 100 years later will earn a big sum of money. |
63楼2011-03-10 16:46:58
5楼2011-02-25 14:06:04
★ ★ ★
poyoro(金币+5): :tuzi3::tuzi3::tuzi3: 2011-02-25 14:30:55
xia_chong(金币+3): I peifu you! :D 2011-02-25 18:01:05
poyoro(金币+5): :tuzi3::tuzi3::tuzi3: 2011-02-25 14:30:55
xia_chong(金币+3): I peifu you! :D 2011-02-25 18:01:05
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植物中含有纤维素、木素和色素。在造纸过程中,将植物茎杆(如稻草)经过碱煮,木素和色素溶于碱液中,被水洗除去,但是难得除干净,纸浆里面仍含有少量的木素和色素。这些木素和色素在 阳光和空气的作用下,逐渐发生了变化,使得纸变 ; 黄变脆。 Plants contain cellulose, lignin and pigment. In the papermaking process, the plant stems (such as straw) after alkaline cooking, and pigments dissolved in alkali lignin, was washed to remove, but a rare addition to clean, which still contains a small amount of pulp lignin and pigment. The lignin and pigment under the action of sunlight and air, and gradually changed, making paper, variable; yellow brittle. ![]() ![]() |
7楼2011-02-25 14:21:20
8楼2011-02-25 14:29:49









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