巧折档案盒北京铁路分局档案室田秀英纸制牛皮纸档案盒在使以前通常都要进行折叠，由于保管条件不符合温湿度规定标准．从而造成纸张中含水量降低．卷盒变脆。折叠时，在卷盒脊背等痕迹线处就会出现断裂、起毛现象，既影响使用寿命，表面又不美观。如何克服这种现象的产生... Qiao folding file box Beijing Railway Branch archives Tian Xiuying paper kraft paper file box in the past usually have to be folded, due to storage conditions do not meet the temperature and humidity standards. As a result, the water content in the paper is reduced. The box becomes brittle. Folding, in the case of tracings and other trace lines will appear broken, fluff phenomenon, both affect the service life, the surface is not beautiful. How to overcome this phenomenon ...