由北京图书馆图书保护研究组与沈阳化工厂研究所共同开发的新型图书虫霉防治药剂无萘高效安全卫生球于1990年12月通过鉴定,并已批量生产(卫生许可证号:沈卫消药字第91—17号)。经北京图书馆图书保护研究组的检测,并与市场上流通的精萘卫生球、樟脑精块,以及其它的化学、中药防虫剂对比试验结果证明,该药具有防虫杀虫十分明显、无毒或微毒、不污染 By the Beijing Library Research Institute of Library and Shenyang Chemical Plant Institute jointly developed a new book insecticide prevention and treatment of non-naphthalene efficient safety and health ball passed the identification in December 1990 and has been mass production (Health Permit No. Shen Wei consumer Medicine Word No. 91-17). The Beijing Library Library Research Group of the test, and the market circulation of refined naphthalene ball, Camphor block, and other chemical, Chinese medicine and insect control test results show that the drug has insecticide insecticide is very clear, non-toxic Or slightly toxic, do not pollute