I'm fairly new to mini painting hobby and I'm very much enjoying it so far. I've made an observation which has probably been discussed previously but my forum searches are not turning up anything (in the 15 min I looked). I've noticed that the Bones miniature polymer material has darkened in color when comparing to figures from 4 years ago. See attached image. This is definitely not as dark as the Bones Black line but still a clear darker shade than the earlier Bones figures. Was this due to better mechanical properties (along the same lines as Bones Black), purely aesthetic reasons, an uncontrollable change in the resin supplier or maybe all of the above?