There were some questions in the comments section that I didn't want to linger...so I'm going to answer them since they are specific to the original underlining post!
1. Just to make sure I understand correctly, the underlining is not the same thing as the lining, correct? For example, you might use underlining in a skirt, but then also add a lining to finish it?
Yes, that's correct. The underlining is attached to the fashion fabric by basting or machine stitching. The lining, however, hangs away from the fashion fabric...and I typically use a lining after I have inserted underlining...but not always!
2. If the underlining and the fashion fabric are of different fibers (for example, silk organiza underlining and linen fashion fabric, how do you decide how to wash the finished garment?
I'm going to throw this out to the general population because anything that I put that much effort into DOES NOT go into the washing machine! But that's just me. Maybe someone else is not as adverse to throwing these types of garments into the washer and can offer some tips!
3. This may be an incredibly dopey question, but (gulp) here goes: how is underlining different from interfacing?
The Innovative Sewing blog defines interfacing as "Sew-in or fusible fabric used to stabilize fashion fabrics. Can also add body, reinforce, or shape a garment."
So underlining supports a fabric and assists with the properties of a fabric where as interfacing is used to stabilize and add body. Some examples...you interface a waistband or a collarband, you underline the body of a jacket, a skirt or a dress.
4. Follow-up - Underlining and interlining are the mean the same thing? Just semantics?
I think these words are used interchangeably but I can be wrong! So again, I'm throwing this out to the general public for clarification...and Angie I'm jealous that you can get silk organza at your local Joann's...
Hope this helps! These were some really good questions and I wanted this topic to be as clear and informative as possible. As always....more later!