When to Replace the FEP Film?

FEP and PFA (nFEP) films may start to wear after printing a while, and once it has major signs of wearing and dents, deformation, or pierce it may require replacing. There are a few conditions that indicate that the FEP or PFA (nFEP) film requires replacing, these signs include:

  1. Severe dents, bumps, and scratches.
  2. Too cloudy.
  3. Loss of tension.
  4. Pierced.
Pour some alcohol in the resin vat, then place a paper towel beneath, if wet spots appear on the paper towel it means there are holes on the FEP or PFA (nFEP) film.

Inspecting the FEP Film

When inspecting the FEP or PFA (nFEP) film, we suggest holding it against the light and check for defects. If the FEP or PFA (nFEP) film has minor scratches or slight loss of tension, though it may still seem functional, you can perform a test print to see if it produces any errors while printing.

Try increasing the lift height by 1 mm when encountering a slight loss of tension.

Normal FEP Film vs. Damaged FEP Film

A Normal FEP or PFA (nFEP) film should produce prints with a smooth surface; a damaged FEP or PFA (nFEP) film's prints will have scratches across the surface.


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