Applying Kapton Foil Without Bubbles – The Wet Method

Kapton is a polyimide film wich can withstand a wide range of possible temperatures from -269°C to 350°C. Therefore, it is an optimal material to cover the printing bed of a 3D printer. You might have seen the thin yellow foil on some 3D printing beds before. Kapton can be bought as a tape or foil, both come with a sticky side, ready to be put onto the glass surface of your printers pad. However, when applying the Kapton tape or foil to a glas surface, you often end up with bubbles – at least it happens to me. Since the sticky sides sticks very well, it is almost impossible to get rid of the bubbles, which defies the purpose of having a nice smooth surface for your prints.

The best way to apply a Kapton foil without bubbles is the “Wet method”. By applying a thin layer of detergent and water onto the glass surface, the Kapton tape sticks a bit less in the beginning, which allows you to remove any bubbles that may form on the adhesive side with a ruler. I made a video of showing the overall procedure.

Thanks to Sriram for the camera work! You can spot him at the end of the video.


About Wilfried Elmenreich

Understanding the communication networks of the future.
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