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.
• Hypothesize reasons for similar and dissimilar results under the varying conditions.