Thank you so much, Pamela. Thank you for the reminder of the page that you put together for me. I did manage to get a picture from Jane showing two faces of one band. The weft is quite heavy and looks like it is a purple synthetic yarn. Unfortunately, the shots are again very low res.
Jane contacted me via my blog and sent me a link to a video (URL below) she made in her husband's village in Sumatra showing a band being woven. I can't tell if the warp threads are being twisted as the pattern sticks are inserted. My first guess was that it was basic complementary-warp pick-up creating two and three-span warp floats but I made a quick attempt to chart one of the patterns and found that some of the warp floats would be too long and concluded that there must be twisting/twining.
She says that...'' This type of weaving in Sumatra is used as an edge decoration for a much larger piece.'' It would seem that the bands are sewn to the edges? Perhaps they are not being created by twining around the large pieces' warp-ends anymore? Sandra's book most likely has the answers and I shall go and look.
The video is wonderful and I have already replied to Jane to see if I can go visit! I will be in Australia this June and would like to take that opportunity to go to Indonesia.
VIDEO URL....
https://www.youtube.com/watch?v=4VDfup4JIJA