Hi When I do a design on the towel I float a piece of Tulle on top of the towel and then a piece of wash away. When the design is done rip the wash away and the tulle from around the design. The tulle will keep the design from sinking into the towel tuffs. You will be happy when you see all the strings showing on your harp design..
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I would stitch the design on a piece of fabric and then apply the fabric like a patch onto the towel.
I am soo sorry the picture doesn't seem to want to load for me, I will try and delete this posting until I can work this out, sorry admin. I think I will just give up .
I can not see a picture but I think I know what you are talking about. I often use tulle as a topper or the plastic type WSS.