I have a big blind spot around the introduction of casino-grade plastic chips, looking for info on the following questions as regards Bud Jones, Abbiati, Gemaco, B&G, Matsui, etc...

GPI showing slugged injection molding first step:
Another video showing the molds, and some kind of edge insert that presumably creates a cavity that is later filled
Casino multi-layered plastics as well as "solids," home multi-layered slugged, etc...
- Is Nylon the primary component of these chips? As compared to ABS or other types
- The similarity between chips is very close... was there a company that made the machines that make these chips, that sold to each of these companies? Or a patent they all licensed? Or did injection molding just develop to a point where it was widely accessible to anyone
- Are they injection molded in multiple phases? Or one injection-molded core that gets finished some other way? Does anyone know the steps in this manufacturing process? We've all seen the color samples that show the different layers...

GPI showing slugged injection molding first step:
Another video showing the molds, and some kind of edge insert that presumably creates a cavity that is later filled
Casino multi-layered plastics as well as "solids," home multi-layered slugged, etc...