Forgery is the copying of another persons writing or signature.
criminals use it for signing cheques falsely.
AIM: to figure out which pen is used.
To write a forgery letter.
Hypothesis: we will know which pen was used
Beaker filter paper pen sellotape water
Method
1 put a dot on the filter paper 2 cm up.
2.put 50 ml of water in the beaker.
3.put the paper in the water and leave 5 minutes.
4.attach a piece of the letter to the paper with sellotape.
5.place the paper in the 50 ml of water
2.compare the two ink marks.
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