A cautionary tale of fusible interfacing

Interfacing is so important when making a garment. It helps stabilize fabric, stiffen it where needed and all around help make a better garment. But choosing the right interfacing can be confusing if you don't understand the different types. I will be highlighting the most common interfacing, including my personal commentary.

Fusible vs. Non-fusible
I think this is a preference thing, but I personally like fusible interfacing. When ironed onto the fabric, it sticks creating a smooth, stiff piece of fabric. When using non-fusible interfacing, one must baste it to their fabric, therefore creating possible puckers and bubbles. (Plus it is just more work!)

Fusible Woven vs. Fusible Non-woven
Fusible woven interfacing is basically a thin piece of cotton-like material with fusible on it. Fusible non-woven interfacing is a bonded material (usually polyester) with  fusible on it. Both can be used in the same way. Use it for collars, cuffs, waistbands and some necklines. These can also be used to stabilize areas like buttonholes.

A rule of thumb would be to use a lightweight interfacing with a lightweight fabric and a medium or heavy weight interfacing with the same weight fabric.

Do not use fusible interfacing on laces or netting, beaded, sequined fabrics, vinyl, leather, rainwear fabrics, acetate and faux furs. If you need to stabilize any of these fabrics (except the laces) use non-fusible interfacing. Use a press cloth to adhere to some fabrics in case the fabric cannot stand the temperature at which you are using. I sometimes use a damp press cloth. When using a damp cloth, it "tells" you when it is adhered--- the fabric drys and your interfacing is fused in place!

Using Interfacing on Knit Fabrics
Yes you can use interfacing on knits! You will want to find a lightweight knit tricot interfacing. It is essentially a sheer knit with glue on the back. You can also find knit tricot interfacing without glue. This will help add shape to cuffs, necklines, etc. Many patterns call for a strip of fusible interfacing along shoulder seams also.