The eight major characteristics of handwriting identification are as follows:
(1) Writing level characteristics. A sign that reflects the level of a person's writing skills. It is determined by factors such as the degree of coordination of writing movements, the structure and layout of characters, and writing speed.
(2) Font characteristics. The basic shape of the external outline of characters, such as square, rectangle, garden, flat, etc.
(3) Font characteristics. The writing form of the text and the characteristics of the calligraphy school or style.
(4) Layout characteristics. The arrangement form and distribution characteristics of text symbols throughout the text. Such as the direction and shape of word lines, the spacing between words and lines, the relationship between word lines and grid lines, the relationship between word lines and page margins, the characteristics of line transitions and spaces, the arrangement position of formulaic language and page numbers, the arrangement position of numbers, etc.
(5) Character writing characteristics. That is the basic structural form of the word. For example, single characters can be written in current standard writing methods, variant writing methods, customary simplified writing methods, cursive writing methods, abbreviations, typographical writing methods, etc.
(6) Collocation characteristics. The intersection between strokes or radicals and the height, distance and relative position.
(7) Proportional characteristics. The size, length, width and width ratio between strokes or radicals. Characteristics of written symbols. The writing and placement of punctuation marks, transpositions, insertions, corrections, etc. The sum of an individual's handwriting characteristics indicates the particularity of his or her writing habits. It is the basis for handwriting identification.
(8) Stroke order characteristics. The order in which strokes or radicals are written. Characteristics of the movements of starting, moving, closing and connecting when writing basic strokes.