Chemical Smoothing

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TPU Parts

What is Chemical Smoothing?

3D printed part surfaces exhibit rough, powdery and porous surfaces, limiting the use for various applications.

Chemical smoothing gives you a wealth of possibilities to enhance the appeal, durability, surface roughness, and overall quality of your 3D-printed part. It provides a sustainable post-processing solution to deliver repeatable and reproducible results for high-volume production.

Benefits at a Glance

  • Enhances aesthetics
  • Increase mechanical properties
  • Seals part surface
  • Reduction in bacteria growth
  • More efficient coating


  • Elastomers
  • Rigid Plastics
  • Performance materials

How does chemical smoothing work?

During the process, a vaporized solvent is injected into the process chamber, where the vapor condenses on the surface of the part. A chemical reaction takes place between the solvent and the outer layers of the material, weakening the bonds of the polymer chains on the surface, resulting in a rearrangement to a more stable position. At the end of the process, the solvent is diffused, leaving a smooth and sealed surface. The accuracy and strength of the smoothing effect is controlled by controlled chamber conditions and exposure durations to achieve the desired surface finish.


Polypropylene (PP) is a common and versatile polymer used for a variety of applications in automotive, aerospace, medical, and consumer industries. Learn more today.


With Additive Manufacturing, it can be challenging to produce parts with professional-grade surface finishes, making post-processing an essential step in the 3D printing process.


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