This is a cleaning power test with chemical synthetic detergents.

The seasoning was applied to the test cloth, dried in sunlight for 1 hour, and then washed.

Although it is difficult to see in the photo, the color of the test cloth washed with synthetic detergent is whiter than that of the new test cloth.
The test cloth has a slightly cream color.
This is due to the optical brightener (fluorescent agent) contained in synthetic detergents.
Test fabrics washed with CLIMA have the same color as new and maintain the original color of the fabric.