Features of Gel Pen Mark
Qing Li · Journal of Shanxi Police Academy · 2011
As the jelly in the gel pen is usually non-oily,the writing is similar with it formed by ink.And the figure and the writing formation is very similar with ball pen.Gel pen has the features of both ink pen and ball pen,which is used widely.Based on the study on gel pen mark and the comparison among gel pen,ball pen and ink pen,the features of gel pen mark,affecting factors and detecting methods could be concluded.