Thanks for the informative article, Dave! This actually helps me out. I'm in the process of making a display for a T206 St. Louis Cardinals team set. One of the pieces that I plan on using in the display is a team patch from that era. I found a nice logo that I'm going to get digitized so that I can embroider it but I wasn't sure of what fabric to use. I wanted the patch to be as close to period as possible and now I know what to look for.
So thanks again!