The Conservation Laboratory of Bangladesh National Museum was established in 1974. The Conservation Laboratory became the Department of Conservation Laboratory on 27 December 1975. This Department undertakes scientific conservation and restoration of objects periodically sent by the Curatorial Departments of Bangladesh National Museum. The officers of this Department are trained in conservation science abroad. The process of conservation involves cleaning and treatment with chemicals. In addition to looking after the objects of Bangladesh National Museum, the Department of Conservation Laboratory takes care of objects sent from the branch museums. It controls humidity, temperature and ultraviolet radiation. It also safeguards the Museum against insects and atmospheric gases. The Department of Conservation Laboratory arranges training, workshops, seminars and lectures on conservation and restoration for museum personnel. Moreover, it provides knowledge in conservation as well as conservation and restoration services to other museums and allied institutions on request. The Conservation Laboratory of Bangladesh National Museum has been an institutional member of The International Institute for Conservation of Historic and Artistic Works since 1994.