I used to work for a machine shop that made alot of plastic parts and it looks like nylon or Polypropylene to me. Polypro kinda looks like it is made out of compressed "flakes" and their might be a few discolored flakes in them. Its a pain to cut and if you want to get the burrs off you need to use a BRAND NEW razor blade. If you figure out what it is you can find out if it is dieable. OR, just try it.