Block fusing is a simple (but very helpful) technique you could use when you have pattern pieces that require interfacing. It simply involves applying fusible interfacing to your fabric before you cut out the relevant pattern pieces, rather than cutting a pattern piece out of your fabric and interfacing separately and then fusing the two cut pieces.
Pattern pieces which need interfacings are often intricate, curved or biased pieces such as facings, waistbands, collars and collar stands. Fusing them after they’ve been cut can therefore risk either stretching out the fabric pieces while applying the interfacing, or ending up with slight mismatches in shape between the interfacing and the main fabric. Block fusing avoids both, and saves time, because you cut the pattern pieces out (once) from fused fabric, and you apply one whole piece of interfacing to one whole piece of fabric.
Want to know more? Check out the steps below.
- Lay out all the pattern pieces which need to be completely interfaced, and cut out a section of your main fabric big enough for all those pieces. Leave a little extra room in case your fabric shrinks as you apply the interfacing.
- Cut a piece of interfacing to fit the main fabric piece. I usually cut it slightly smaller than the main fabric piece, just to avoid the risk of fusing to my ironing board cover. Fuse the interfacing to the wrong side of the fabric.
- Place your pattern pieces back on the interfaced main fabric piece and cut them out.
- Admire your beautifully (and accurately) interfaced pieces!