Yep. I just finished a quilt that was white on the front, cobalt blue on the back. I quilted (fmq) daisy-like flowers that all ended up with very pale blue centers when I misted the water soluble stabilizer. (I sometimes draw my quilting design on that instead of using paper. Way easier to remove!)
Anyway, the area where the thread crossed multiple times is now pale blue. I used quality blue thread in the bobbin, & quality white thread on the top. I never did get the blue out. Both the white fabric & the white thread are tinted blue in the centers.
This is a first for me....never had it happen before.
Oh....I have never pre-washed thread...or even considered doing that.
Last edited by mindless; 06-30-2018 at 08:53 AM.