PEI print surface preparation

Updated 7 months ago ​by Tomáš Chvalina

The print surface should be regularly maintained to achieve optimal printing quality and minimize the chance of failed prints. It's an easy procedure, so let's take a look at our tips and recommendations. 

Wash your hands and clean them from any creams or similar substances before proceeding

How to prepare your print surface 

  1. To achieve the best adhesion of the print surface, it is vital to keep it clean. The best option when printing with ABS, PLA and many other materials is Isopropyl alcohol (always use IPA 90%+),  which can usually be bought at your local drugstore. PETG is an exception - the adhesion may be too strong for it. For PETG, we recommend using a separating agent (e.g. a glue stick). For more information on how to print with PETG, check out our extensive guide.
  2. The second option is to spray some window cleaner (Windex or similar) on a paper towel and wipe the surface with it. Keep in mind that window cleaners degrease the surface 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 surface using a paper towel in combination with warm water and a few drops of dish soap. Denatured alcohol is also an option.
  3. About once a week, or when prints stop sticking, use ACETONE to clean the bed. It removes grease better than IPA or Windex. It also rejuvenates the print surface. However, if you use acetone every day, PEI will become brittle and start cracking.
  4. If you don't touch the print surface with your hands or dirty tools, then you don't have to clean it before every print. Clean your tools the same way as you would the bed, and you will be able to start your next print right away.
  5. It can happen that you will leave some small marks on the print surface with your nozzle or tools. Typically, they will be shinier than the rest of the pad. 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 the hard side of a dry kitchen sponge and gently wipe the affected area in a circular motion a few times.
For more information about increasing the PEI adhesion visit the Increasing PEI adhesion.

Do not hesitate to contact us at info@prusa3d.com if you have any further questions.



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