PEI print surface preparation

Updated 2 weeks ago ​by Tomáš Chvalina

Make sure that your hands are clean of any creams before doing any of the following steps

How to prepare your print surface 

  1. To achieve the best adhesion on the new surface, it is important to keep the surface clean. Cleaning of the surface is very easy. The best option is Isopropyl alcohol (always use IPA 90%+) available in drugstores for ABS, PLA and others, except for PETG where the adhesion may be too strong. 
  2. The second option is to use a gentle spray of a window cleaner (Windex or similar) on a paper towel and wipe the surface. Window cleaner degreases less than IPA. The bed can be cleaned even while hot, just be careful not to touch the surface or the nozzle. Alternatively, you can clean the bed with warm water and a few drops of a dish soap on a paper towel. Denatured alcohol is yet another option.
  3. About once a week or when prints stop sticking use ACETONE to clean the bed. It removes the grease better than IPA or Windex. It also rejuvenates the print surface. However, if you used acetone every day, PEI would get brittle and start cracking.
  4. If you do not touch the print surface with your hands or dirty tools you do not have clean it before every print. Clean your tools with the same solution as you would the bed and you will be able to start your next print right away.
  5. You can leave small marks on the print surface with your nozzle or tools, they will typically be shinier than the rest. It does not affect the functionality or adhesion. However, if you want to have the same surface look on the whole printbed you can resurface it. The easiest way is to take a hard side of a dry kitchen sponge and wipe the affected area with circular motion gently few times.
For more information about Increasing the PEI adhesion. You can visit the Increasing PEI adhesion.

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