Well, buyer beware on eBay.
A seller sold me
a lovely fabric that they claimed was 100% silk, a remnant of drapes they had made for a customer. I just did a burn test, and am doing a bleach test, and it burns as ... an acrylic! Nothing is dissintegrating in the bleach.
I've requested a partial refund (I don't expect to get it), as I would not have paid so much for the fabric if I had known it was an acrylic. I can still use it as pretty pillows for our bedroom or something, but not for the costume piece I had intended for it to be. At least my other brocade was a partial cotton. This ended up with a hard black bead. Bah!
I also found out while doing a bleach test on some old wools that I was putting into my records, that is, too, was not what was originally claimed.
It has some wool... of maybe 20%, if that, but not the 100% wool I had originally noted when I bought it (the rest is modacrylic/nylon from what I can tell by the burn test). My loose gown is what I made from the fabric, and it has been ok to wear in the summer and colder winter, but it will be replaced this summer by a new loose gown.
Two loose gowns, actually, one of the dark green wool flannel I bought for winter. And one of my other fabrics that I thought was a wool blend, well it is a blend, but it is mostly wool according to its bleach test (just a few fibers remained). It is light enough for summertime use. And no, I didn't accidentally swap swatches. The mostly modacrylic is still as dark blue as it went in, and the other swatch is from a tone-on-tone tartan in blues.
Other report... Space Bags in Cube form doesn't work as well in storing fabrics,
at least not in the cardboard boxes I am putting some of them in. The bags are really tall, and take up a lot of room on their own, and fabric just doesn't compress a whole lot. I ended up using regular space bags for my wools (to protect them from moths), and will stack those in my fabric cupboard that has the space for it (as I am clearing out fabrics I don't want). I can lay out the wools so they aren't as scrunched up in the boxes, so that's ok. I've got a lot of cleaning to do in that room, and reorganizing, tho it will have to wait a bit until I finish my two projects this week.