硝酸银凝胶的制备及应用:Ⅰ显现PVC管道上的指纹

Preparation and Application of Silver Nitrate Gel:on PVC Pipe

使用溶胶-凝胶法将常用的指纹显现剂硝酸银制成凝胶,根据其溶剂挥发慢以及立面不流淌的特性,将其试用PVC管道上,效果明显优于传统的硝酸银溶液。对于细而弯曲的PVC管道上的指纹,可以分别拍出上下两半的照片,然后使用PHTOSHOP进行处理,得到完整的指纹图像。

The sol-gel method was used to prepare gel-type silver nitrate fingerprint reagent. Trying it on the PVC pipes, the performance of gel-type silver nitrate is obviously superior to common silver nitrate solution, on the basis of its slow solvent volatilization, low diffusion and no flow on impermeable vertical faces. For the fingerprints on the thin and bent PVC pipe, the photos of upper and lower halves can be taken, and then the PHTOSHOP was used to get a complete fingerprint image.