本文介绍普兰染色显现渗透绵纸和棉织品等表面潜在唇纹新方法,为有关部门提供技术参考。普兰与潜在唇纹中的油脂成分发生吸附作用,在浅蓝色的背景下显现出深蓝色的唇印纹线,纹线清晰连贯,认定价值较高。该法操作简单,有着极大推广和实用价值。 This article describes the pullan staining of tissue paper and cotton and other emerging surface potential lip wrinkle new method for the relevant departments to provide technical reference. Pulan and latent lip in the fat composition adsorption occurs, in the light blue background shows a dark blue lip print lines, clear and consistent lines, identified higher value. The method is simple, with great promotion and practical value.