Craftsy has provided a guide on how and when to use interfacing. After discussing when interfacing is applicable, and how to choose the right interfacing for a given task, a step-by-step guide to applying interfacing is provided.
HTC Retail’s Fusi-Form Lightweight, #1140, http://www.htc-retail.com/product-info.php?pid3.html, is an ideal choice for this application. It is a fusible, chemically bonded nonwoven interfacing that is useful for sewing light- to medium-weight knits, wovens, and loose-weave wovens.
For more information, visit: http://www.craftsy.com/blog/2013/06/using-interfacing/