Pirated books use low-priced and inferior adhesives, which may contain formaldehyde. The best way to remove this smell is ventilation and drying. The inferior ink used in pirated books will be polluted by heavy metals and aromatic hydrocarbons (toluene, etc.). ) and volatile organic compounds (formaldehyde, etc. ).

Books:

Books are the main tools used by human beings to record all their achievements, and also the important media for human beings to blend their feelings, acquire knowledge and inherit their experiences, which has made great contributions to the development of human civilization. At all times, people always give the highest affirmation and special care to books. UNESCO's definition of a book: all printed materials with more than 49 pages published by a publishing house (enterprise), excluding the front cover and back cover, have a specific title and author's name, and have an international standard book number. A publication that is priced and protected by copyright is called a book.