Conventional handwriting identification does not include the identification of handwriting writing time. Handwriting time identification is also a big problem in the world.

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.

If you need to identify the writing time of modern documents, you should first find an appraisal institution recognized by the court to issue relevant appraisal reports. However, because there is no such standard in the country, I personally think that the court may not adopt it, so just refer to it.

As far as the study of antiquities is concerned, the following methods can be adopted:

In the identification of cultural relics, sometimes a certain font or writing method is commonly used in a certain historical period, which can identify the approximate period of writing.

Usually, when it is necessary to identify the age and time, it is confirmed by materials. For example, the carrier of words (paper, ceramics, fur, bamboo slips and so on. ) common at a certain age or period; A certain composition of ink is often used in a certain age, from which we can roughly judge the approximate period.

Then directly use carbon 14 to identify and judge the age and period.