Compare two dish washing liquid to see which one makes more bubbles.
For dish washing by hand, more bubbles may indicate more active material in a detergent. For mechanical dishwashers though, more bubbles may cause some problems.
 Material and instructions
Compare two dish washing liquids to see which one makes more bubbles. The test should be performed in identical conditions for both samples. Record the results and draw a conclusion.
Details of this project
More details of this project are available in the members section of web site. Since research on this subject has a long history, you might also be able to find good books about it in your local library or find some information on the internet.