Fingerprint
You will need a very soft paintbrush, a clean glass, some clear sticky tape, a piece of card, and some hot cocoa powder.
- Touch the sides of the glass with your fingers, then sprinkle cocoa powder over surface.
- Brush the cocoa powder away with your soft brush.
- Carefully place a piece of tape (sticky side down) on the dusted fingerprint. Lift off the tape and place it on the piece of card to preserve the print

