Washing rayon blend tops so the colour survives the season

Open a drawer at the end of a summer and the pattern is easy to spot. The black tank from a three pack looks fine. The wine red one from the same pack, bought the same day and worn the same amount, has gone a shade flat. Nothing went wrong. The dye simply had further to fall.

Cold water, and mean it

Temperature is the single largest factor in dye loss on a rayon blend. Warm water swells the fibre and lets loose dye walk out of it. Cold water does not. This costs nothing, requires no special detergent and is worth more than everything else on this page combined.

Turning the shirts inside out helps for a second reason. Abrasion against the drum lifts fibre ends on the outer face, and a roughened surface scatters light and reads as faded even when the dye is intact.

The dryer is what shortens them

A rayon blend that goes into a hot dryer comes out slightly shorter every time, and the change is cumulative rather than something that relaxes back. A tank that measured 20 inches at the shoulder can be at 19 inside a month of regular drying, which on a top designed to sit at the waistband is the difference between covering and not.

These dry flat in an hour or two because the fabric is light and mostly polyester. Laying them out rather than hanging avoids the shoulder bumps that a hanger leaves in a lightweight knit.

Wash the first one on its own

Saturated reds and deep blues release loose dye on their first two or three washes. That is normal and it stops. It is also how a white tank from the same pack picks up a permanent pink cast. Running the bold shirt separately the first couple of times removes the risk entirely.

Storage decides the last third of the life

• Fold the tanks and tees rather than hanging them. A lightweight knit stretches at the shoulder under its own weight over a season.
• Hang or roll anything with a high spandex share. Spandex fails at a permanent crease, and on a bandeau the crease lands exactly where the grip is needed.
• Keep the drawer out of direct sun. Sunlight fades folded fabric through the top layer and leaves a visible line.
• Do not store them damp, even slightly. Polyester tolerates it. The rayon share does not.

The short version

1. Cold wash, inside out.
2. No dryer on anything with rayon in it.
3. First two washes of a bold colour go separately.
4. Fold the knits, hang the stretch.

Four habits, none of them time consuming, and they are the difference between a pack lasting one summer and lasting three.