I was at a meeting last month that involved some show and tell. A piece was shown that had the most wonderful fabric with what looked like little moons on it. I just had to know how she did it and, like most dyers, she was kind enough to share her technique with me.
So I took some hand-dyes that lacked oomph and folded them up.
I got out the little clamps that I purchased when I started hand-dyeing (but never used). They have little squares and rectangles where they clamp, not circles, so I raided my parking meter change for quarters. Then I poured black dye over them.