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对于涉密缩微黑白银盐胶片的销毁,应保证不泄露国家保密信息,避免造成国家安全和利益遭受损害。目前常用的缩微胶片销毁方法有粉碎法、焚烧法等。遵循环境保护原则,且应尽可能地将所有介质循环利用等原则,对涉密缩微黑白银盐胶片选用有效氯含量为10%的次氯酸钠溶液进行浸泡销毁,具有可操作性,价格低廉,效果显著。对销毁液过滤后的滤渣中的银,可选择置换法进行回收,回收率较高。
For the destruction of classified microchips of black and white silver salt film, it should be ensured that state secrets are not leaked and national security and interests are not damaged. Currently used microfilm destruction methods are grinding method, incineration and so on. Follow the principles of environmental protection, and should be as far as possible all the media recycling and other principles, the use of microfilm black and white silver film selection of effective chlorine content of 10% sodium hypochlorite solution for immersion destruction, with maneuverability, low prices, the effect is significant . After the destruction of liquid filter residue in the silver, replacement method can choose to be recovered, the recovery rate higher.