孤斑作为一种常见的纸张污损现象，不仅破坏书籍的观赏价值，而且往往难于清除、使书籍恢复原貌对其成因的揭示将有利于纸质文物巾狐斑的防治工作。但狐斑作为一种较为复杂的现象，一直以来没有形成统一的结论。本研究对上海历史博物馆馆藏近代书籍中狐斑的着生情况进行了调查统计。结果表明，该馆藏近代书籍狐斑发生率达到60％，孤斑发生与纸张类型、酸度间存在一定的关联？酸度较高的机制纸中孤斑的，发生率叫显高于手工纸。本调查可为近代书籍及其它早期机制纸质文物的保藏、保护工作提供一定的依据。%Foxing on paper is a common phenomenon that damages the aesthetic value of books. It is difficult to remove foxing thoroughly and thus it is hard to restore the original appearance of the book. An understanding of the formation of foxing is beneficial to its prevention. The origin of foxing has not been clearly explained due to its com- plexity. This study investigated the state of the foxing contamination in books collected by the Shanghai History Mu- seum and provides information on preservation and conservation of modern books and other early machine - made paper relics. The results showed that nearly 60% books have foxing. There is some correlation between foxing and paper types, the pH value of paper. Machine- made paper (especillay newsprint) , with a relatively low pH value has more severe foxing than handmade paper.
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