以炭黑为染色物质,将其分散在水中,加入适量的表面活性剂,制成黑色湿粉,并用炭黑湿粉对光滑非渗透性客体及半渗透性客体表面的汗潜手印进行显现,得到了较好的显现效果。同时,对陈旧手印及潮湿客体表面手印的显现效果进行了验证,最终确定了黑色湿粉显现手印的适用范围。 Using carbon black as a dyeing material, dispersing it in water, adding an appropriate amount of surfactant to make black wet powder, and displaying the sweat latent fingerprints on smooth non-permeable objects and semi-permeable objects by using carbon black wet powder, Get a better show effect. At the same time, the appearance effect of the old handprints and damp objects’ surface fingerprints has been verified, and the applicable scope of the black wetprinting handprints has finally been confirmed.