P3D sent me 3D printing sheets for the testing. These are for BambuLab printers (P1P, P1S, A1, X1C) but they are available in many different sizes. Tested sheets are textured PEI, PEO and PEY. All 3 sheets are two sided. I measured the bed adhesion but also, I analyzed the bottom surface too. In most cases, they take over the pattern from the sheet.
PEO, PEY, PET, H1H sheet collection purchase link (not affiliate):
https://p3d.mx/collections/peipeope...

Dimensions of test object: base 20x10 mm, hole is at 30 mm height. You can download this object for your testing on Printables:
https://www.printables.com/model/4656...
Search for file: bed_adhesiontest20x10.stl

Contents:
0:00 Introduction, unboxing
4:00 Textured PEI
4:57 PEO
6:09 PEY
9:27 Conclusions

#3dprinting #3dprintingsheet #pei #peo #pey