Block Printing prevalent in the Tang Dynasty

SuiDynasty-ThangDynasty-Song Dynasty, can be see One chinese dynasty, (then 13century=Genhiskhan ) the prevalence of Block Printing, the word is engraved in the wood block, and then to China and India, this method works material costs. In the event went wrong, come to naught, as a whole version of the child must be destroyed. Bi Sheng is determined to change this backward printing, he summed up the experience of their predecessors, through repeated experiments, and finally the invention of moveable type. This is a moveable type in the lettering on the clay tablets, a printed word, in fact burned, was etched in the hard type, and then print publishing. These type can be used many times more than in full-page engraving of economic convenience, increased speed and print quality. Moveable type operation quickly spread all over the world, so that printing technology has undergone tremendous changes.