2. High-end pirated books. The overall printing quality is high, which is not much different from the original book and difficult to distinguish. The paper is better, the ink color is more uniform, the hue is better, the overprint is more accurate, the image level is clearer, the finished product is cut more square, the binding quality is better, and there are fewer text errors.
3. Check the appearance of the book carefully. Specifically: the cover of the first trial. Compared with genuine books, the cover of pirated books is often incorrect in color, or dull and listless, or gorgeous and enchanting, and the color matching is often mixed. As long as they are often compared, it is not difficult to tell the difference between them. Second, look at binding. According to the practice in the publishing industry, a genuine book with more than 200 pages should be bound with lock thread, plastic thread or wireless instead of iron wire. However, due to the limitation of printing and binding equipment or cost reduction, pirates still use wire binding for pirated books with more than 300 pages and 400 pages. Look at the printing house. Each publishing house has several fixed printing users, and each printing house has its own characteristics in paper, ink and printing. If you pay attention to this at ordinary times, it will help to identify pirated books. Fourth, look at the paper. Books should be printed on both sides. If the paper is too thin, it will easily mix with ink, resulting in illegible handwriting. Therefore, except for dictionaries, the original book paper is 52 grams and above. Once you meet a book with thin paper and the handwriting on the other side is exposed, you must be careful.
Review the text of this book. There are three manifestations of pirated books in the text: first, there are many typos, typos, words, derivatives and sick sentences; Second, typesetting is often irregular, sparse or dense, and the vision is blunt; The third one looks like a copy. Some pirated books are copied according to the original book without separate typesetting, which can avoid typographical errors and ugly typesetting, but there are many ink spots on the paper, and the handwriting is often swollen, which looks like a copy drilled from the copier. In fact, no matter how fake, there is always a distance between pirated books and genuine books. So it's best to shop around for books.
5. Pay attention to book publishing information. Such as publishing house, ISBN, edition and so on.
6. Price: Genuine books are uniformly priced by relevant departments, so the purchase discount of genuine booksellers is relatively high, and the purchase discount is similar. Therefore, buyers must shop around when buying books. For some books with ultra-low prices, you must ask clearly before buying, which is greedy for cheap.
7. It is best to choose some bookstores with relatively large scale and good credit when buying genuine books, because these sellers generally have more legitimate purchase channels. If you are not sure whether the book you want to buy is genuine, you must find the seller to understand the situation and let the seller make a guarantee. If you find the characteristics of the above-mentioned pirated books, you should immediately report complaints to the relevant departments and ask the seller to return them.