Here's some pretty detailed info on the Type-19 helmet cropped from a PLA supplier's manual. It goes into a bit of everything from text results / results to durability.
This said, I still can't really figure out the precise level of protection offered by the Type-19, especially compared to different generations US helmets like the PASGT, ACH / ECH, IHIPS etc. (which depending on the blogger or "expert" you're listening to, ranges anything from late PASGT level to somewhere between the ECH and IHPS).
Is there any further info or data (range / testing results, official docs, producer stuff...) regarding the Type-19 / Type-15 I can dig into? Would very interesting to know