Will Bleach Whiten Wool? No, generally chlorine bleach will turn wool fabrics yellowish, and when that stain appears it is irreversible. You are stuck with the yellowish tint. There may be an oxygen bleach variety that may be safe for wool but the general rule there is that it should not be used on either wool or silk.

How do I get my wool white again?

Add approximately 1 tablespoon of hydrogen peroxide per cup of water. Immerse the garment under the water and let it soak for 15-20 minutes. Repeat this process until the yellow has been removed (you may need to increase the amount of hydrogen peroxide you are using), then launder as usual.

What happens if you use bleach on wool?

On the back label of all our liquid bleach products is a statement: “Avoid bleaching wool, silk, mohair, leather, Spandex and non-fast colors.” Its sodium hypochlorite active can attack the wool fiber and unfortunately, the resulting yellowing is permanent and not reversible.