I have been wanting this thread forever. Ever since I saw it used in contrast to silk wrapped purls on trees on a big stumpwork mirror frame in the Museum of Fine Arts, Boston. In this type of purl, we had a plate made first and then covered it with silk thread. The plate was then wrapped around a needle and made into this delicious thread.
It is really slow to make. The thinness of the silk and slow process of wrapping the plate has a full day to wrap enough plate to make seven meters of the purl the next day. That is TWO DAYS of machine time to make seven meters. WOW.
But the effect is just amazing.