What is the common binding method of ancient books in Song Dynasty?

Butterfly clothes handed down from the Song Dynasty were converted into thread clothes by later generations. Official engraving generally refers to the title page on the back of the book, while private engraving and square engraving can refer to cards and seals; The judgment of the rough age can also refer to taboos and lettering. Comprehensive theory. Generally, the Song version has been recorded and studied for a long time, and the dragon slaying technique is basically of little use in the Song version. As for the printing time, we can only judge the first printing, the second printing, the modification and the supplement according to the handwriting, the layout and the center of the plate. We can infer the time of printing and publishing according to the description of the card, the introduction of the preface and postscript, the working age of the engraver and the taboo. Among them, the first two can provide exact date or even exact date, and the latter two are the second-best methods that can only be said to infer approximate time. Thread-bound books refer to the types of books bound with thread, also known as ancient thread-bound, which is an important invention of working people in ancient China. The ancient paper books in China experienced two stages: scroll and album. The reel consists of coils, shafts, ribbons and belts. There were only books in this scroll form in the Han and Tang Dynasties. Today, we see scroll paintings hanging on the wall, or the legacy of scroll mounting. Song Dynasty is the era when book printing broke out, and various binding methods began to appear. Song Dynasty is the most important period of book binding form, and it is the period of great development and foundation of book binding form. Not only the butterfly clothes and treasure quilts were obviously made in the Song Dynasty, but also the thread-bound books were made in the Song Dynasty. Although paper was invented in the Han Dynasty, bamboo was still the main writing material at that time, followed by silk. Writing books on paper, from the perspective of literature records and archaeological discoveries, does not have sufficient evidence to show that it was popularized in the Han Dynasty (especially in the Western Han Dynasty). Thread-bound books appeared in Baobeizhuang in the middle of Ming Dynasty in15th century. This is the first time in the history of China binding technology that scattered pages are gathered together and bound into a book by splicing. Its appearance marks that our country's binding technology has entered a new stage.