本文通过对复印墨粉类字迹材料的组成成分分析和一系列理化实验 ,从原理上阐述了复印墨粉类字迹粘连、脱落的原因 ,并且提出了保护这类字迹材料的方法 ,为复印墨粉类字迹文献的保护工作提供了理论依据 In this paper, we analyzed the composition of copy-based calligraphic materials and a series of physical and chemical experiments to explain the reason why the copy-type calligraphic letters stuck to each other and shedding reasons, and put forward the method of protecting such kind of hand-written materials, This paper provides a theoretical basis for the protection of the typewritten literature