Post-Processing Safety

The job isn't over when the print finishes. Post-processing activities like removing supports, sanding, and gluing come with their own set of safety risks that require your attention.

Removing Supports & Cleaning Prints

Removing support material and cleaning up a print often involves sharp tools.

Always Wear Safety Glasses

When breaking off supports or cutting plastic, small, sharp fragments can fly off unexpectedly. Protecting your eyes is the number one priority.

• Cut Away From Yourself: When using flush cutters, a hobby knife, or a deburring tool, always direct the cutting motion away from your hands, body, and other people.
• Use a Stable Surface: Brace the part on a workbench or cutting mat instead of holding it in your hand. This prevents the tool from slipping and cutting you if the part suddenly gives way.

A person wearing safety glasses and gloves carefully using a deburring tool to clean up a 3D print. The cutting motion is directed away from their body, and the part is held in a vise.

Sanding and Finishing

Sanding printed parts produces fine plastic dust that should not be inhaled.

• Dust Inhalation Risk: Breathing in microplastic dust can be harmful to your lungs. The risk is significantly higher when sanding composite filaments that contain abrasive particles like carbon fiber or fiberglass.
• Use a Dust Mask: Always wear a well-fitting dust mask (rated N95/P2 or better) when sanding 3D printed parts.
• Work in a Ventilated Area: Sanding in a well-ventilated area or outdoors helps to disperse the airborne dust.

A person wearing a proper N95 dust mask and safety glasses while sanding a 3D printed part.

Gluing and Bonding Parts

• Ventilation: Adhesives like super glue (cyanoacrylate) and two-part epoxies can release irritating fumes. It is best to use them in a well-ventilated space.
• Skin Contact: Avoid getting strong adhesives on your skin. Work carefully and consider wearing nitrile gloves.