指纹捺印工具知识系列讲座（下）乌信梓三、硬版指纹捺即这是目前最新的一个品种，软版指纹捺印由于其捺印版软质有弹性，捺印时一定要控制好用力大小，否则，用力太重，手指上蘸油太多，按印指纹纹迹就会成墨团漆黑一块。硬版指纹捺印则采用硬质多孔材料作捺印版，印油同... Fingerprint stamping tools knowledge Lecture Series (below) Wuxin Azusa Third, the hard-finger fingerprint That is the latest version of a fingerprint softener fingerprint printing due to its soft and flexible version of India, India must be controlled when printing size, Otherwise, the force is too heavy, too much finger dipped in oil, according to print fingerprints will be a black ink into a dark piece. Hard fingerprint imprint is rigid porous material to suppress printing plate, printing ink with ...