Laundry bluing is most commonly found in liquid form, though powdered bluing is available in tablet form. Bluing bars are also available and are excellent for spot-treating yellow stains.
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Laundry Bluing: What It Is and How to Use ItNevertheless, here is how to use bleach in laundry for your other non-white clothes. The product used, liquid bluing, is simply a colloidal suspension of very fine blue iron powder and water.
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