Also a method of developing fingerprints is via the use of superglue fumes. Below is an approach that may be used:
You will need: superglue; aluminium foil; a cup of hot water; a weak heat source such as a lamp; a fuming chamber (may be an enclosed cardboard box which can contain the fingerprinted medium).
1. Set up the lamp in the corner of your fuming chamber and cover over the light bulb with a piece of aluminium foil.
2. Carefully spread some superglue over the outer side of the foil - DO NOT USE FINGERS.
3. To increase the humidity within the fuming chamber, place a cup of hot water into the box, next to the lamp. This will create the necessary 'fumes'.
4. After self fingerprinting an object such as a simple sheet of paper or a plastic slip, place this object into the fuming chamber with the lamp and water. Tightly shut the lid to allow the fumes to develop the prints.
5. Remove the lid after 10-15 mins, check that the prints have developed. If they have not, try placing more superglue on the foil or decreasing the size of the fuming chamber so that less space is present. If you have placed too much superglue on the foil or left the print inside for too long, the fingerprint will become covered with a white and snowy looking layer.