I was doing a test stitch on a tee shirt - 96% cotton 4% spandex, and after unhopping, I have hoop marks. Are these permanent?
I did a test stitch a week or so ago, and after many many issues, I had to take the embroidery unit off to clean the bobbin area out, and I lost my design which had to be adjusted as to where the center of the design was. I tried to take the stitches out with peggy's stitch eraser, but ended up with holes in the shirt. I also noticed hoop marks, but as the shirt had been sitting in the hoop for a week or so, I thought it was from that.
I received my new Madiera thread, and tried another stitch out tonight, which was beautiful. But after unhooping, I find I have hoop marks again. What is it? Does it rub the pigment off the shirt? The shirt is a light dusty blue, and the hoop marks are an even lighter dustier blue.