First of all, printing ink does not contain aromatic hydrocarbon "benzene", and a small amount of xylene will be added to some silk-screen printing inks as dilution solvent to dissolve PA (polyamide) resin as adhesive. "Benzene" and "xylene" are two completely different organic substances. Pure benzene has very high physiological toxicity, while xylene has very low toxicity, which can be normally metabolized by human body (excreted in the form of methylhippuric acid). After the ink is dried, the xylene in it has completely volatilized, and there will be no ppm residue, so it can be used safely. Relatively speaking, printing ink is not worried about its solvent xylene, but colorful color-forming substances. The color source of many printed newspaper and magazine posters is toxic aniline dye, which is another topic. Aniline and pure benzene are completely different chemicals, and the carcinogenic toxicity of aniline is far greater than that of xylene. Frequent contact with newspapers, magazines, picture books and other printed matter does absorb a small amount of ink. As the saying goes, "Walking by the river, shoes can't be wet." The library can open the window regularly to improve the circulation of fresh air, and maintain a certain humidity in the library, which is helpful to reduce the volatilization and dissociation of aniline toxic substances in books. If you feel unwell while working in the library, please seek medical advice as soon as possible. If you are allergic to aniline ink or have acute urticaria, you can carry a small amount of loratadine and chlorpheniramine with you. Please refer to.