Hello! I've somehow managed to get myself into making an unoa hybrid which definitely requires dyeing faceplates. Now, the problem lies in the fact that the faceplates have nowhere to have a string tied to - especially for the sleeping faceplate. I've seen glimpses in tuts and videos where people use a sieve or a netting of some sort, but I've failed to find any info on the materials they're made of - perhaps someone knows what I should be looking for. thank you!
I once successfully dyed doll parts by putting them in a thin rag (obviously the rag got dyed too). I held a single piece at a time and made a sort of very loose sac with the rag.
You'd want a steel sieve. Steel is a nonreactive metal so it won't affect the dye. You also want to use a steel pot for the same reason. The sieves should be available in the kitchen section in most stores. I got a 3 pack of different sizes and used the medium one for dying hands, feet, and bits. It's the same kind of thing you'd use to dust a cake with powdered sugar