1. Low-end pirated books. The overall printing quality is poor and easy to distinguish. It is manifested in the following aspects: poor paper (thin paper, yellow and gray), uneven ink color, hue deviation, inaccurate overprint, blurred image, tape marks or imposition marks on the edges of pictures and texts, uneven cutting of finished products, poor binding quality (many quality problems such as missing lines and wrong pages), and many text and punctuation errors (some typos can reach more than ten yards).
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.
Generally speaking, low-end pirated books are printed by small printing houses or underground printing houses with low-end equipment, and some small pirated booksellers operate in a piecemeal and guerrilla way. High-end pirated books are printed by powerful large-scale pirated booksellers using high-end equipment, and some even use imported equipment.
It can be said that the current pirated books are mainly low-end pirated books, and this situation will continue for quite some time, but we should also see a small number of high-end pirated books. Therefore, we cannot simply think that "pirated books are not the ones with good printing quality, but the ones with poor printing quality", nor can we blindly think that "pirated books must be cheaper than genuine books".
The most accurate way to distinguish pirated books is to compare them with genuine books published by publishers with the same paper, printing and content, and also to check the copyright page of books (the copyright page of genuine books must include the cataloging data of books in publication, the name and address of publishing unit, the format and version of books, etc.). ), the international standard book number and bar code mark are complete and clear, and if necessary, consult the publisher of genuine books. Of course, if there is an anti-counterfeiting mark, it is still not difficult to distinguish.
First, quality:
1. Check the appearance of the book. 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.
2. 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.
3. Pay attention to book publishing information. Such as publishing house, ISBN, edition, etc. The reason why I dare to conclude that the book "Notes on Mountain Residence" I have read is pirated is not limited to many typos. Yu's Notes on Mountain Living originated from Harvest in Shanghai, and his articles such as Shame in Shaanxi have been included in the selected books such as Fragments of Civilization (Spring Breeze Literature and Art Publishing House Edition) and Yu Qiu Prose (Zhejiang Literature and Art Publishing House Edition). Yu refused to collect and publish Notes on Chinese mainland Mountain Residence for fear that readers would pay too much attention (the book was published vertically in traditional Chinese characters on Taiwan Province Island on 1995).
Second, the price: genuine books are uniformly priced by the relevant departments, so the purchase discount of genuine booksellers is relatively high, and the purchase discount is similar. Therefore, buyers must shop around for books in online bookstores. For some books with ultra-low prices, you must ask clearly before buying.
Third, it is best to choose some online bookstores with relatively large scale and good credit to buy 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. After receiving the seller's books, if you find some features of pirated books, you should immediately report complaints to the relevant departments and ask the seller to return them.
The above is an excerpt, and the following is my own experience.
First read the whole paper of the book. Relatively speaking, the original book paper is much better;
Second, it depends on the quality of the pictures inside. The quality of genuine pictures is much better, while pirated pictures are blurred.
Third, look carefully for typos.