1. Dip a brush (paint brush) into a bowl or beaker of graphite powder.
2. Lightly brush the fingerprint powder all over the glass surface. Try not to touch the surface...If you touch it you may contaminated it with your fingerprints..even wearing gloves will smear the prints.
3. Use a magnifying glass to find if there are any fingerprints on the surface.
4. If you find a fingerprint take a piece of thick clear masking tape and place on the surface on top of the fingerprint.
5. Finally lift the tape off of the surface and place on a white index card.
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