First, lets get this clear - I'm not a savage, so I wouldn't be sitting around my house, playing with those chips if they were still casino-filthy. Ew.
It's definitely a function of wear, but I wonder if the wear just wears differently on this mold. Because I have worn THC molds, and they don't feel plasticky.
I know it doesn't make sense, but that's how it feels.
And this isn't the first time I've noticed it either.
There's a casino near me, Twin Rivers, that has Paulson RHC molds with giant inays. And they're fairly worn. First time I went there, I had a rudimentary knowledge of chips, but I didn't know very much. I played with the chips for a few hours, I they looked and felt like plastic chips, but I took one home anyway. And then I later learned that yeah, those are paulsons.