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Typography, one of the four great inventions of China, is of tremendous dedication to the civilized 22 shells bulk world. This discovery led to still be Chinese proud. Method print left by Tat Thang invented in the Northern Song period were enhanced printing performance many times over, go to the world for hundreds 22 shells bulk of years.
Before this discovery, people 22 shells bulk are using a reverse printed with inscriptions. Reverse inscription is also a person of great inventions of ancient 22 shells bulk China, but its weaknesses 22 shells bulk are also clear. When printing your books, unless required to reproduce, woodblock 22 shells bulk prints are unaware user into nothing, wasted time and materials. Woodblocks a book sometimes have several years to complete, the price is very high for the price of a book is very expensive. Multi-page book, the inscription very difficult to preserve. In addition, each site is a complete inscription, if there is a false inscriptions, very difficult to fix. This old way of printing flawed so many people have so little time to try to correct thinking. 22 shells bulk First Person successful inventor affordable Tat Thang at Nhan Tong (1041-1048).
Tat Thang is an affordable intellectuals Northern Song period, the details of his life, the books do not say anything. But scientists in the Song Dynasty Beauty Card "Joinery Khe pen" negotiations (2), said details of the circumstances Tat Thang invented print from leaving, even briefly introduced in "his father 22 shells bulk Khanh center-right Calendar (3) Every Thang ". From there, we can know life he lived in Chongqing Calendar, affordable background. He is well aware of the strengths and weaknesses of the printing of engravings, 22 shells bulk decided to use a new printer instead. He said that the limitations of the old way of printing them by inscriptions as "dead", can not be changed or corrected in a flexible manner. Through arduous research and repeated tests, finally, he found a way to print left, which led to significant progress in the printing job.
Tat Thang in no way used inscriptions as old ways that used clay with inscriptions. First, use clay to form embryos under certain way, on each embryo, carve a single word contrary, after engraving, fire baked until stiff. Thus did the word earthen left. For convenience of Scrabble, 22 shells bulk the word used much like the word "chi", the word "wild", 22 shells bulk ... are making many times the amount of other words. Some places can do little use when needed, that time can be used for burning grass fire.
Bring the letters 22 shells bulk have been manufactured categorized under "transportation", the same word "operation" to enter a wood box, on a card slot for easy search. When printing, preparing a steel plate on which a layer of adhesive may, kind commonly used resin, beeswax mixed with pulp. Steel plate around a steel belt. Then, based on the document to be printed, put the letters 22 shells bulk in a row left the entrance to the full site, each site will be a printed page. Take it into the mold heated in the fire, the binder will melt, use a flat wooden panels and then put pressure on the mold out. When the mold cools, hardens, a print was formed. To increase productivity, you can use two steel slab, a print, a Scrabble. The first of baked finished, the second edition also completed the placement of text, two plate change, the preparations may be faster.
By testing of Tat Thang, if only in two or three copies, look out over the old way of printing, this new way is not how much more simple, but if hundreds of copies to print, thousands of copies, a new print faster so than in the old way, saving a lot of effort, the better quality. When finished printing mold, no need to keep, put on fire, melt adhesives, the letters will be left out, bringing such classified alphabetically old to use the next time.
But just commoners, Tat Thang had great invention, is a great achievement in the history of scientific and technical development 22 shells bulk of humanity. Equipment, technology, modern printing quality versus print method of Tat Thang much progress, but the basic principle remains unchanged.
After the invention of printing techniques with the letter left of Tat Thang, the later continuing on the path of innovation, leaving print methods are constantly being improved. Early life Originally, some people have used tin to cast the letter. Vuong Trinh Nguyen in lifetime use wood carver leave letters, he also invented the letter box of the mobile can make Scrabble person can sit in place, 22 shells bulk thereby mitigating the labor intensity of workers, enhanced productivity high. To his life, the appearance of cast iron letters left, then left with lead letters, Chinese printing techniques have the boom, in a long time, a pioneer in printing techniques of the world, contribution of Tat Thang can not forget.
Print technique leaves 22 shells bulk have important influence in the printing of the countries in the world. After
