CHOOSING AND USING NOTIONS TIP When Sewing a Softly Structured Top or Jacket from a Knit Fabric, Pick a Fusible Interfacing with the Right Qualities
Knits need support that doesn't entirely compromise their stretch. Listed in order of increasing structure, the interfacings below are soft, will preserve the fashion fabric's texture, and can be used for any interfacing function, from partial to allover support, if you like the effect after testing.
Crosswise and bias only
Most versatile; subtle support for all fabrics. Useful
for reinforcing all knits without changing stretch. Good for hems, pockets
Ideal for spongy, lofty fabrics, such as pile and raschel
knits. Arrange so that crosswise stretch of fabric is preserved. Good for
Ideal for collars and lapels. Cut on bias for
undercollars and sleeve heads.
-- Sarah Veblen
Adapted from "Sewing Jackets from Knits," Threads magazine, February/March 2002 (#99), p. 48.