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Ask Dr. Laundry

Ask Dr. Laundry

Whitening Cotton/Polyester Blends

By Dr. Laundry November 4, 2011

Q:  How do you whiten cotton/polyester blends?

A:  Cotton/polyester blend white fabrics can be safely washed with Clorox® Regular-Bleach on an on-going basis.  Always wash whites in hot water – or the hottest water recommended on a care label.  It’s also important to use enough bleach:  3/4 cup Clorox® Regular-Bleach for normal size loads, and up to 1 1/4 cups for extra-large or heavily soiled loads.  In a standard washer, delay bleach addition for best results by diluting 3/4 cup bleach in 1 quart of water and adding it to the clothes washer 5 minutes after the wash cycle has begun.  If you have a HE washer, with a small-capacity bleach dispenser, consider washing two smaller loads if you have heavily soiled laundry.

For extra whitening or heavily stained items, use a bleach soaking solution of 1/4 cup Clorox® Regular-Bleach per gallon of water.  Fully submerge the item for 5 minutes, then rinse.  Finish by washing the item in hot water, using detergent + 3/4 cup Clorox® Regular-Bleach.

Readers, have you bleached anything recently?