Sorting laundry before washing is a maintenance practice in the broadest sense — it prevents the kind of damage to fabrics and machine components that results from washing incompatible items together. While it may seem like a purely laundry-care concern, sorting directly protects the machine from the consequences of problem washes: dye transfer staining that requires re-washing at high temperatures, lint accumulation from mixed fabric types, mechanical damage from washing items that shed hardware, and seal damage from unsuitable garments.
Sorting by Colour
Why it matters: Dark or bright dyes in new garments are prone to bleeding, particularly in the first several washes. A red or dark navy item washed with white or light garments can transfer dye permanently.
Basic colour groups:
- Whites and light greys — wash together, suitable for higher temperatures and bleach where needed
- Medium colours (pastels, light blues, soft tones) — mid-temperature washes
- Dark colours (blacks, navies, deep reds, dark greens) — cold or low-temperature washes to minimise dye loss and protect colour vibrancy
New garments should be washed separately for the first two to three washes regardless of colour, as dye transfer risk is highest when garments are new.
Sorting by Fabric Type
Different fabrics require different wash temperatures, agitation intensity, and spin speeds. Washing them together forces a compromise that is often wrong for at least some items in the load.
Heavily soiled cotton and workwear — tolerates 60°C or higher, longer cycles, high spin speed. Washing these with delicates will damage fine fabrics.
Synthetics (polyester, nylon, acrylic) — typically 30–40°C, moderate spin. At high temperatures, synthetic fibres can pill, stretch, or deform permanently.
Delicates (silk, lace, fine knits, lingerie) — cold or 30°C maximum, gentle cycle, low or no spin. These items should never be washed with heavy cotton or workwear.
Towels and bedding — absorb large amounts of water, best washed separately to allow proper circulation. Washing towels with light garments causes lint transfer onto dark fabrics.
Woollens — require dedicated wool cycles with specific low agitation and cold water to prevent felting (irreversible shrinkage caused by hot water and agitation).
Items That Should Never Go in the Machine
Certain items damage the machine regardless of how they are sorted:
- Garments with sharp metal hardware (large zips, metal embellishments, wire bra cups) should be placed in a laundry mesh bag or washed by hand — metal hardware can score the drum interior or damage the gasket
- Items with loose sequins or beading shed these into the pump filter and drain system
- Items labelled dry clean only
Sorting takes under two minutes before each wash and prevents a long list of both fabric and machine damage outcomes.