(1) In terms of printing quality, there are two main types of pirated books.
The overall printing quality of low-level piracy is poor and easy to distinguish. It looks like this: the white paper (yellow, gray tissue paper) has uneven ink color, deviated tone, incorrect overprint, blurred image or often stuck with marks or marks on the edge of the image, the finished product is not cut into squares, the binding quality is low (there are many quality problems, such as line loss and poor page quality), and there are many text and punctuation errors (some typos may exceed 65438).
2. Advanced piracy. The overall printing quality is very high, which is not much different from the actual books, and it is more difficult to distinguish: the paper is better, the ink color is more uniform, the tone is better, the overprint is more accurate, the image level is clearer, the finished product is cut square, the binding quality is better, and there are fewer text errors.
Usually, low-priced piracy is printed with low-priced equipment in small printing houses or underground printing houses, and it is produced by some pirated small sellers, short sellers and guerrillas. More powerful large pirates have more advanced equipment, and some also use imported equipment for printing.
You can regard the current pirated books as low-level pirated books, which will last for a long time, but you can also see some high-end pirated books. Therefore, you shouldn't have thought of it, should you? It's not pirated books with good printing quality, but pirated books with poor printing quality? , not? Pirated books should be cheaper than genuine books? .
The most accurate way to identify pirated books is to compare them with the paper, printed matter and content of the actual books of the same publishing house, and check whether the copyright page of the book (the copyright page of the genuine book is the version of the book) is complete and clear, as well as the catalog data, the name and address of the publishing unit, the format and version of the book, etc. If necessary, please contact the original book publisher. Of course, with the anti-counterfeiting logo, it is not difficult to distinguish.
(2) How to distinguish genuine books from pirated books?
? 1. quality
1. Details of the test site. Specifically: the cover of the first trial. Different from real books, the cover of pirated books is usually inaccurate, vague, unpublished or charming, and the colors are often mixed. According to the comparison between Qin Jia and Qin Jia, the difference between them is not difficult to identify. Second, look at binding. According to the practice of publishing industry, books with more than 200 pages should be bound with thread, plastic thread or wireless glue, not with wired binding. However, due to the limitation of printing and binding equipment or cost saving, pirates use wired binding for pirated books with 300 pages or more. Three people looked at the printing house. Each publishing house has a large number of regular printing users, and each printing house has its own characteristics in paper, ink and printing. Usually, paying attention to this helps to identify pirated books. Look at your paper. Books need to be printed on both sides If the paper is too thin, it is easy to mix with ink and the handwriting is blurred. So apart from the dictionary, the real book paper is over 52 grams. Be careful when you find the tissue, because the other side of the book is bare.
2. Check the content. There are three expressions in pirated texts. One is typo, typo, personality, spawning, sick leave sentence. Secondly, the typesetting is not neat, sparse or dense, which is visually difficult. The third one looks like a replica. Some pirated books are not typeset, but they will be typed according to the original, which can avoid text errors and ugly printing, but there are often a lot of ink and greasy words left on the paper. It seems to have been punctured by the copier. The copy came out. In fact, no matter which forgery method is adopted, there is always a distance between fake books and genuine books, so it is best to buy more copies when buying.
3. Source
To buy genuine books, it is best to choose some large-scale and reputable bookstores. This is because these sellers usually have more suitable purchase channels. If you are not sure whether the book you bought is genuine, please ask the seller for information and guarantee. If you find some features of the pirated books after purchase, you should immediately report to the relevant departments, lodge a complaint and ask the seller to return them.