In this exercise you will determine the effects of water on latent prints. Take a drinking glass and handle it, making sure to leave fingerprint impressions on it.
Immerse the glass in water for several hours. After a significant length of time, visually examine the glass and see if you can still see your fingerprints. Attempt this in a variety of conditions such as hot water, cold water, soapy water, or salt water. Keep notes on your results under each condition.