Liquid UV resin easily penetrates through the skin. UV resin is a skin sensitizer, which means every time you expose your skin to it it become more sensitive. The effects of exposure often not immediate. Reactions include pimples, wheals, redness, pain, burning or itching sensations, and overall extensive inflammatory reactions.
This sensitivity is permanent. [source]
While not all UV resins are respiratory sensitizers, all are respiratory irritants and some people are more sensitive than others. Harmful effects could include headaches and some respiratory problems, including swelling airways, trouble breathing, as well as pain and irritation in your airways. Prolonged inhalation can cause respiratory allergies and irritation or inflammation in the lungs. Even temporary or limited exposure to epoxy fumes aggravates pre-existing respiratory diseases.
Hobbyist level limited exposure to resin printer fumes is unlikely to have any severe effect on your health. Plus, rooms with sufficient ventilation are relatively safer even if you use resin printers routinely, but you assume the risks. Material Safety data sheets are available online for all resins, with detailed information.
Pregnant women should avoid exposure to UV resins.
It is advisable to wear nitrile gloves, protective glasses, and a mask to protect your hands, eyes, and against toxic fumes.
If resin spills in your hands or eyes, the best you can do is wash your skin and eyes with soapy water, then thoroughly rinse with clean water. If you sustain serious injuries, it is advisable to seek medical attention or consult your doctor immediately.
You must wear gloves, mask, and goggles when: