How to distinguish old thread-bound books

Look at the paper. The newly brushed paper must be new. Now the paper is machine-made paper, and there is no curtain pattern. Now 99% of rice paper on the market is also mechanical. In the past, paper was made by hand and had curtains; You can still smell it. There are chemical components in the ink now, which is different from the previous ink.

There are many books bound with thread, ancient books or imitation ancient books. At present, ordinary genuine books are mostly bound with glue, while pirated books are mostly bound with glue to reduce costs. Pirated books are also divided into high imitation, low imitation and genuine without number. Explain that the genuine book without number is part of the printing of the publisher beyond the number set by the author. Except for the number, it is a genuine book, but it can never be said to be legal. In addition, the quality of paper and printing is also an important factor to distinguish genuine products.

Thread-bound books are books bound and sewn with thread, often used as ancient books or imitations. At present, ordinary genuine books are mostly bound with glue, while pirated books are mostly bound with glue to reduce costs. Pirated books are also divided into high imitation, low imitation and genuine without number. Explain that the genuine book without number is part of the printing of the publisher beyond the number set by the author. Except for the number, it is a genuine book, but it can never be said to be legal. In addition, the quality of paper and printing is also an important factor to distinguish genuine products.