How to Block Crochet or Knitting with Spray Starch
Use spray starch to block crocheted items for a light- to medium-crisp blocking finish. You can use spray starch to block almost anything, but is especially useful for blocking snowflakes, doilies, and other lacy pieces. Spray starch holds up well, but if you wash the item, you'll need to reblock it.
Hand wash the crocheted design with a mild soap and cool water.
Rinse the design several times to remove all soap residue.
With a clean towel, blot out excess moisture until the design is just damp.
Use several towels, if you need them.
Prepare a blocking surface suitable for pinning down your design.
Try using a plastic-wrap over a piece of cardboard or foam board. Wax paper also works.
Spray one side of your design with starch and place the starched side down on your blocking surface.
Work quickly so that you get the design placed and pinned down before the starch dries.
With rustproof pins, pin out your design to the required dimensions.
Take extra care to shape stitch patterns.
Spray the other side of the design.
Make sure that the fabric is lightly saturated.
Blot excess starch from the design with a clean, dry towel.
Allow the piece to dry completely.