At present, some appraisal institutions are studying the handwriting time, such as: confirming the writing time of carbon-containing ink by fading degree; Ink color standard method is used to identify the time of document production, but there is no standard in this respect.
Handwriting identification is a special technology to identify the writer according to the characteristics of people's writing skills and habits, as well as the reflection in writing handwriting and painting. The main task is to prove whether the handwriting on the documentary evidence is the same person's handwriting and whether the handwriting on the documentary evidence is the suspect's handwriting through the same handwriting identification test.
Handwriting identification can test not only normal handwriting, but also handwriting with changing writing conditions (including writing posture, writing tools, filling, etc.). ), deliberately camouflage handwriting (including left-handed handwriting, ruler-drawn handwriting), imitate handwriting, and draw handwriting. When the same person writes with the same pen, the characteristics of pen marks can also be used to enrich the basis for identifying the writer. Handwriting identification is the same identification, and the whole process can be divided into three stages: individual inspection, comparative inspection and comprehensive judgment.