This is a quick, simple tool to assist when separating skeins of kumihimo (or embroidery) floss into working clusters with the desired number of strands. The upright is a sandwich of a piece of EVA foam between two pieces of 1/4″ stock (MDF here but, something like Baltic birch ply or acrylic should work, too). The EVA is sliced with a razor blade in the middle of each channel. Then, just glue it all together with wood glue. Some clamping is likely required while it dries.
It is probably best to clamp it down to a table when using. Knot the end of the skein/bundle of strands and, slip it into the cut in the EVA. That should keep the end in place while you separate the full length.
[…] is a separate post with the design files for the floss separator I made for this, in case it is of use to anyone […]