There's more to the sorting game than just keeping dark garments away from the gleaming whites.
First, sort by color.
Wash all whites separately; pastels and medium colors together; brights and darks by themselves. Pay special attention to white and lightly colored synthetics; they can pick up dark dyes from other fabrics during washing. Check trimmings and decorations for colorfastness too.
Second, sort for soil.
Sort out those heavily soiled items away from the lightly soiled ones, since lightly soiled items can pick up the extra soil from the wash water. Whites will slowly become more gray or yellow; colors will become more and more dull.
Third, consider specialty sorts.
The Unmatched Set: Mix small and large items together in each load. This lets clothes move more freely, resulting in better washing.
The Fabric Types: Consider the fabrics and how they are constructed. Separate loosely knitted garments and delicates from regular wash loads, then wash on the gentle cycle.
The Lint Losers: Fuzzy sweat shirts, chenille robes, flannels and new towels have a tendency to share their lint with other garments during washing. Wash them in a load by themselves — away from corduroys and permanent press garments, which attract lint easily.
The Fluorescents: Hot pinks, bright greens, electric blues are often much less colorfast than other fabrics. Wash them separately or test them first before washing with other colors. For safety's sake do not pretreat with stain removers unless you have tested them for colorfastness first on an inconspicuous area. Fluorescent colors may fade over time.
Sorting Secrets: Created on January 6th, 2005. Last Modified on January 21st, 2014