So how do you keep your whites white? First, don’t ever wash with chlorine bleach. Second, to maintain your textiles’ white dye, wash your whites with a gentle soap and a tablespoon of chlorine-free oxygen bleach. This nontoxic, biodegradable bleach alternative, also known as sodium percarbonate, will whiten your clothes safely and beautifully. One caveat: Don’t use it for washing silks or woolens.

