Sort Clothes First
For more efficient washing and to prevent problems with incompatible colors or fabrics:
Sort by Color
Keep whites and pastels together, same-color brights together, and dark colors together. Multi-colored clothes that have lots of white and dark colors are best washed separately the first time. If the dye does not bleed or run, it can be washed along with whites the next time.
Sort by Fabric Type
Separate delicate or lightweight fabrics from heavy ones. Don’t wash lint producers (such as towels) in a load of lint-attracting clothes (corduroy).
Remove Heavily Soiled Items
Separate for special pre-treatment or simply to prevent transfer of dirt and/or bacteria (such as with diapers) onto less soiled clothes.