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Minor Versionm

by Nico Willem Lagendyk


This guide will cover how to smooth the surface of 3D printed objects using the wet sanding technique to avoid plastic melting into your sandpaper.

    • Grab several grits of sandpaper. You will want to start around 200 grit or so and work up to higher grits

    • Fill a small paint mixing cup with water. These are in the cabinets in the AFL. If you are in another lab, ask your LC if they know where some are.

    • Lay some paper towels down on the table so you don't get water everywhere

    • Pour a splash of the water on to your lowest grit sandpaper and gently rub it into the paper.

    • Lightly sand your model. Use a circular motion and go slowly. If you sand quickly, the plastic will melt and ruin your sandpaper.

    • If your sandpaper starts to dry out, add some more water.

    • Once you have sanded across the entire surface of your model with the lowest grit, start the process over again with the next highest grit you have prepared.

    • Resin prints do not melt when sanded fast, but wet sanding will still give you a better surface finish.

    • You can use dry sandpaper for the lower grits to quickly remove material and support bumps on Formlabs parts.

    • Use wet sanding for when you are smoothing the surfaces and want a high level of polish. Grits higher than 1000 should only be used with wet sanding unless the packaging says otherwise.

Finish Line

John Vincent Fitzell

Member since: 08/07/2019

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3 Guides authored


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