In order to establish the identity of the paper, one the questioned as well as the others in the bank copy, from which questioned document is said to have been torn out, the colour, thickness, finish of surface, water mark, style, cutting, size, ruling, fluorescence have to be looked into. But it does not appears to be necessary that before the identity of two papers can be established, all the aforesaid things must be similar, even some of the things may enable the expert to give an opinion about the identity of two papers.
Questions as to whether the paper on which document is written has been torn out from a copy is an expert opinion, under Sec. 45 the opinion on that point of person specially skilled in such science is a relevant fact.
Parag vs Tate of Raj. 1981 Cri. L.J.1244