Answer:

prepare the fabric before sewing:

• Pre-wash your fabric to stop future shrinkage, and remove excess dyes and chemicals from the production process.
• Dry your fabric. A tumble dryer is ideal as it will further pre-shrink your fabric, but it’s optional.
• If you’re using a fabric that requires dry cleaning, not washing, then steam it using your iron to pre-shrink it.
• Iron your wrinkled fabric. You need it to be flat in order to cut your pattern pieces accurately.
• Check the fabric grain lines have not been disgorged.