Science Models
Science Fair Projects

Published on Sep 16, 2023


The objective: Determining what brand of HE liquid laundry detergent is most effective at removing a variety of stains. Creating a process to quantify the cleaning power of the detergents tested.


Six test stains (lipstick, BBQ sauce, mustard, shoe polish, grease, wine) were each applied to seven different shirts. An image of each stained shirt was recorded using a webcam and analized in Adobe Photoshop.

Each shirt was assigned one of the six detergents tested (Cheer, Purex, Wisk, Gain, All, Tide) with the seventh saved as a control using water. Each shirt was washed with its respective detergent. An image of each washed shirt was recorded and analized


In the end, I obtained data for 10oC, 23oC, 40oC, 60oC. Data were in the form of pH over time, so I had to The Tide was on average most effective at removing the various stains, followed closely by All.

In general, Tide was more effective at removing the organic stains while All was more effective at removing inorganic stains. Purex was worst at removing stains.


Certain detergents are most effective on cleaning specific types of stains. Detergent manufacturers must decide whether to focus specific fabric or stain-types, or to create a more general purpose detergent that is less effective overall. For an accurate overall evaluation of the detergents, the tests will need to be repeated on different fabric types.

This project is to determine the effectiveness of six HE laundry detergents upon various stains on white cotton

Science Fair Project done By William R. Ito