How to Create a Fingerprint Detector (simple)

by MechanicPlanet in Workshop > Tools

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How to Create a Fingerprint Detector (simple)

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You need to:

1 - pencil

2 - a knife

3 - paper

Step2

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.Then stripping the pencil of wood as in the picture

Step3

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Grind the lead and put it in a bowl.

Finished

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Put the powder on the place of the fingerprint , then remove it and you will see ...