现在不少单位的办公室、图书馆等都有静电复印机、誊印机等各式办公机具,为人们节约了时间,提高了工作效率,但由此造成的污染,也引起了操作人员的焦虑。静电复印机用的复印显影粉是由炭黑和苯类化合物制成,因此在复印过程中,就会有墨尘和苯挥发到室内空气中。据测验,墨尘浓度可达40毫克/m~3(我国卫生标准 Nowadays many offices, libraries, etc. have all kinds of office machines, such as electrostatic copiers and printer, saving people time and improving work efficiency. However, the pollution caused by this also causes the anxiety of operators. Photocopiers used in electrostatic copiers are made of carbon black and benzene compounds, so that during the copying process, dust and benzene are volatilized into the room air. According to the test, ink dust concentration up to 40 mg / m ~ 3 (China’s health standards