Laundry as white and pure as milk: you only need this ingredient

When viral cleaning tips promise laundry as “white and pure as milk” using just one magical ingredient, they are usually referring to sodium percarbonate (oxygen bleach) or washing soda (sodium carbonate).

Over time, white fabrics lose their crisp brightness and take on a dingy gray or yellowish tint due to a buildup of body oils, hard water minerals, detergent residue, and fabric softeners.

Here is a look at the star ingredient often used for this purpose and how it works:

The Secret Weapon: Oxygen Bleach (Sodium Percarbonate)

Unlike harsh chlorine bleach—which can break down fibers and cause long-term yellowing—oxygen bleach is a non-chlorine, eco-friendly powder that uses the power of active oxygen to lift stains and brighten fabrics.

• How it Works: When dissolved in water, oxygen bleach releases hydrogen peroxide bubbles that gently break chemical bonds holding organic stains and gray residue to the fabric fibers.

• How to Use It for Maximum Brightness:

  1. Fill a bucket or your washing machine tub with warm or hot water.

  2. Add the recommended amount of oxygen bleach powder and stir until it is completely dissolved.

  3. Submerge your dingy white clothes and let them soak for 2 to 4 hours (or overnight for heavily yellowed items).

  4. Drain and run the clothes through a normal wash cycle using your regular detergent.

Other Common Single Ingredients Used for Brightening

Depending on the specific trick being shared, a couple of other household staples are frequently cited for whitening:

• Washing Soda (Sodium Soda Ash): Highly alkaline, it helps soften hard water, cuts through grease and body oils, and boosts the cleaning power of your regular detergent so dirt rinses away cleanly instead of dulling the fabric.

• Borax: A natural mineral compound that acts as a water softener, stain remover, and whitening booster, often combined with hot water to revive yellowed cottons and linens.

Note: Always check the care labels on your garments before soaking them in hot water or using intensive whitening agents, as delicate fabrics like wool, silk, or certain synthetics can be easily damaged.