This document is a chemistry investigatory project submitted by Aishwary Patle of Class XII to compare the water soluble polyphenol (catechin) content in different tea samples. The project describes the aim, introduction to tea quality factors and types, materials required, principle, procedure, observations, result, and precautions taken. The procedure involves weighing tea bags of different brands, soaking in hot water for 10 minutes, reweighing the bags after drying to determine weight loss and calculate the percentage of water soluble components as an indicator of polyphenol content and flavor. The result is that one particular brand was found to have the highest polyphenol content and best flavor.