I’m having a bitch of a time finding details on Rus embroidery that is not gold-work or silver-work. There’s a plethora of articles on metal embroidery, but even when talking about the complimentary stitches alongside the metal-work, it’s simply called “other embroidery.”
After searching in Russian, English and Ukrainian, I finally found a few paltry articles on the subject. I guess compared to working with precious metal, working with ordinary thread is “boring.”
More to come as I uncover and analyze what I find. Too many research papers, not enough time to write them . . .