Uncured photopolymer resin can irritate skin, eyes and airways, and repeated skin contact can cause sensitization that does not go away. Cured parts are far less hazardous. A safe resin workflow is mostly about keeping liquid resin off of you and out of the air you breathe.
Protective equipment
- Nitrile gloves every time you touch resin, the vat, the build plate or uncured parts. Change them when they are contaminated.
- Splash goggles when pouring, filtering or washing.
- Respiratory protection appropriate to the resin's safety data sheet, such as a respirator with organic vapor cartridges in poorly ventilated spaces.
Ventilation
Print in a ventilated room or an enclosure that exhausts outdoors or through filtration. Keep printers out of living and sleeping areas.
Washing and curing
Parts are typically washed in isopropyl alcohol or the cleaner the resin manufacturer specifies, then post-cured with UV light. Keep wash containers closed when not in use.
Waste
Never pour liquid resin or resin-contaminated alcohol down a drain. Cure leftover resin and contaminated paper towels in sunlight or a UV station before disposal, and follow local rules for solvent waste.
Always read the safety data sheet for the specific resin you use. This guide is general information, not a substitute for the manufacturer's instructions.
