Fabric type and water resistance
Our first hypothesis - that amongst the fabric types, polyester is the most water resistant – has been proven to be false. Our second hypothesis - that all fabrics demonstrate better water resistance after a layer of Scotch Guard is applied – has been prove correct.
Waterproof fabrics can be made from natural or synthetic materials. Their ability to resist water droplets makes them suitable for use in manufacturing raincoats, tents and swimming attire . They are normally given a coating of waterproofing chemicals like PVC, rubber or wax.
The science fair project can also be repeated using different types of fabrics besides the ones that we tested.
Try to repeat the science project experiment by immersing the fabric in water and comparing the time taken for them to dry.
What are different types of dressmaking fabric? - http://www.wisegeek.com/what-are-the-different-types-of-dressmaking-fabric.htm
Waterproof fabric - http://en.wikipedia.org/wiki/Waterproof_fabric
How does Scotch Guard work? - http://www.articlesbase.com/home-improvement-articles/how-does-scotch-guard-work-851556.html
Basic safety requirements