So I thought, I’ll just wrap the weft around the warp backwards, and the next thing I knew, I was doing backwards soumak. Non-locking soumak in case you’re an expert! I think it would be hard to do the locking version backwards.
I felt like I’d reinvented the wheel!
It’s easy. You just carry your weft around the back and pop it up just PAST the warp you want to cover, then loop it back over and continue on your way. It makes more of a dot than if you just weave. In this case, I was using one strand of Paternayan Persian, with 2 strands of black sewing thread, so you you mainly see very thin black lines.
Here it’s just the small dot in the middle.
For more information about soumak see page 184 of Peter Collingwood’s amazing book “The Techniques of Rug Weaving.”