Blocking Knitwear: Wet-Block, Steam, and Spray
Blocking is the wet-finishing step that turns a hand-knit fabric into its final form. There are three main methods: wet-blocking (the strongest), steam-blocking (gentle, for synthetics), and spray-blocking (a quick refresh).
Recommended A printable technique cheat-sheet for your knitting bag.
Wet-blocking
The default for wool, alpaca, silk, and cotton. Soak the finished piece in lukewarm water with a small amount of wool wash for 15–30 minutes. Lift gently (do not wring), squeeze out water against a towel, then lay flat on a blocking mat. Pin to dimensions and let dry fully — overnight, in a flat, well-ventilated room.
Steam-blocking
For superwash wool, acrylic, and very delicate fibres. Hover a steam iron 1–2 inches above the fabric — never let the iron touch — and let the steam relax the stitches. Pin and let cool fully before un-pinning.
In partnership Tools and supplies that make this technique easier.
Spray-blocking
A spritz of water from a spray bottle is enough to refresh a project that needs to relax slightly without a full soak. Useful for between-wear care.
Lace blocking
Lace must be aggressively wet-blocked to open the mesh. Pin every point of every scallop along the cast-on and bind-off edges; let dry under tension. The fabric will grow 20–40%.
Cable blocking
Cables relax with blocking. Wet-block to the schematic dimensions; never stretch a cabled fabric horizontally — it will distort the cables.
Tips
- Use rust-proof T-pins or knit blockers; sewing pins will leave marks.
- A foam interlocking-tile blocking mat is the most useful one-time tool you can buy.
- Always block a swatch the same way you'll block the finished piece.