Health and safety hazards of 3D printing

3D printing, also called additive manufacturing, is a way to make objects by building them layer by layer from a digital design. It is used in many places, from homes to factories, to create toys, tools, and even parts for machines. As 3D printing becomes more popular, people have started to notice that it can also come with some health and safety concerns.

One big concern is the smoke and fumes that come out while printing. Many 3D printers release tiny particles and gases, which can be harmful if breathed in over time. These particles are so small that they can get deep into the lungs and cause problems. That’s why it’s important to use printers in well-ventilated areas or with special filters to keep the air clean.

There are also dangers during the finishing steps, when printed objects need to be sanded, painted, or cut. The chemicals in some paints or sprays can be unsafe if they get into cuts on the skin or if too much is inhaled. Using masks and gloves can help protect people while they work.

Because every type of 3D printing works a little differently, some methods have extra risks. For example, some printers use heat or strong lights that could burn someone if they get too close. Knowing the specific dangers of the printer being used helps people stay safe while they create amazing things.

Common types of printing

As 3D printing has grown, many different ways to create objects have been developed. Some of the most common methods include:

• Binder jetting: This method uses a special liquid and powder that hardens when sprayed, then is heated to make it strong.
• Directed energy deposition (DED): This is like another common method but uses melted metal to build up layers.
• Fused deposition modeling: A thin string of material is heated and layered to create the object, which is very popular for home use.
• Material jetting: Tiny amounts of special ink are placed layer by layer to build the object.
• Powder bed fusion: Different powders like plastic or metal are stacked up and then melted with lasers to form the shape.
• Sheet lamination: Thin sheets of material like paper are cut and stuck together to make the object.
• Stereolithography (SLA): A special light hardens a liquid that is shaped layer by layer to create the object.

Hazards

As 3D printing becomes more common in schools, hospitals, and homes, it’s important to know about the possible dangers. One main concern is the smoke and tiny particles that come out while printing. These can irritate eyes, noses, and throats, and might even make some people sick over time. Different materials can release different kinds of particles, and some of these tiny particles can be harmful if breathed in for long periods.

After printing, there are also steps to smooth out the objects, which can involve using chemicals or machines that create more dust and particles. Using safety glasses and masks can help protect people during these steps. Other dangers include getting burned by hot parts of the printer, getting shocked by electricity, or getting hurt by moving parts. It’s important to be careful and follow safety rules when using any 3D printer.

Hazard controls

When using 3D printers, it's important to stay safe. One of the best ways to protect yourself is to choose materials that are less harmful, like Polylactic Acid (PLA) instead of other types of printing materials. Good habits, like using air filters, making sure there's good air flow, and learning how to use the printer safely, can also help. Wearing safety gear, such as eye protection and gloves, is another way to stay safe, though it's usually the last step.

Older safety tips are still useful today. These include using covers on the printer, making sure there's plenty of air flow, keeping a safe distance from the printer while it works, and using special masks if needed. If the printer gets stuck, turning it off and choosing printers that release fewer harmful substances can also help keep everyone safe.

Main article: hazard controls
Further information: ventilation, respirators

Health regulation

While there are no special rules just for 3D printer fumes, some materials used in printing do have safety limits to protect people.

As of January 2026, the National Institute for Occupational Safety and Health shared new advice on how to use 3D printing safely. These tips help everyone, from individuals to schools, stay safe while using these machines.