PEI build plates: smooth vs textured
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Textured PEI for almost everything, especially PETG. Smooth PEI when you want a glossy flat bottom face and are willing to manage adhesion with a release agent.
| Property | Value |
|---|---|
| Bottom surface | smooth glossy, textured matte with plate pattern |
| Adhesion strength | smooth very high, textured high |
| Release when cool | smooth can be difficult, textured easy |
| PETG behaviour | smooth may bond and tear, textured safe |
| Durability | smooth scratches visibly, textured hides marks |
| Needs glue stick | smooth for PETG and ABS, textured rarely |
Where to buy
Comgrow Ender 3 V3 KE PEI Spring Steel 235x235mm, Texture PEI Sheet
The PETG problem with smooth PEI
PETG chemically bonds to smooth PEI. When it cools and contracts it can pull the PEI coating off the steel, taking a visible patch with it. The plate is then permanently damaged in that spot. A glue stick layer prevents this by giving the PETG something else to hold onto — it is a release agent, not an adhesive.
| Printer | Verdict | Notes |
|---|---|---|
| PLA | Fits | no preparation needed |
| PETG | Fits | the safe default for PETG |
| ABS / ASA | Fits | glue stick still helps at the corners |
| TPU | Fits | low bed temperature |
| PA / Nylon | Fits with a mod | needs glue stick or a garolite plate |
Looking after either one
Adhesion getting worse over time on a plate that used to work
Surface contamination or wear
- Wash with dish soap and hot water. IPA alone smears oils rather than removing them.
- Handle by the edges only, always.
- Do not use metal scrapers. They gouge the coating and create high spots that show up in the levelling mesh.
- Let the plate cool before removing a print. Most parts release themselves as the plate contracts.
- Replace the sheet when the coating is visibly worn or patchy. It is consumable.
Sizing
Plate size is machine specific and there is no forgiveness. Measure your existing sheet before ordering — a sheet a few millimetres out will not sit correctly on the magnetic base and will foul the probe or the gantry.
LayerWalker
Print defect diagnosis, calibration procedures and parts that actually fit. Corrections welcome through the contact page.
