Print sheet: What type of coating is it actually?

Hi folks,
I was wondering what kind of coating the Snapmaker 2 print sheets actually have. Snapmaker shop, Google and forum search did not yield anything - is this known at all? From the feel I’d say it is PTFE, from the look its similar to the PEI coating of the Prusa textured beds… You know nothing, Jon Snow :slight_smile:
Cheers
Hauke

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