So you want to print in resin

The Elegoo Mars series is the most-used MSLA platform in the hobbyist community, and the Mars 4 Ultra earns that position. 9K mono LCD, reliable FEP film, tilting release mechanism for better print adhesion, and compatibility with every major slicer — Chitubox, Lychee, UVtools. If something goes wrong, there's a forum thread for it.

Anycubic's entry MSLA — slightly smaller build volume than the Mars 4 Ultra but nearly identical resolution and print quality. Good if the Elegoo is out of stock or you prefer Anycubic's ecosystem.

When you outgrow the Mars's 153mm plate, the Saturn 4 Ultra is the obvious step up. 218×123mm build volume, 12K resolution, same proven Elegoo ecosystem. Print terrain tiles, full busts, and multi-figure scenes without splitting files. Worth it after six months once you know the projects you actually want to make.

The community default for first bottles of resin, and for good reason: lower odor than most standard resins, consistent layer adhesion, and community-published exposure settings for nearly every MSLA printer. A reliable, forgiving starting point at $30–35 per liter.

A dollar or two cheaper per liter and nearly as consistent as the Elegoo Pro 2. Works well if you're running Anycubic hardware and want manufacturer-matched exposure profiles already loaded in Photon Workshop.

If the IPA wash step — cost, fumes, disposal — is your biggest friction point, water-washable resin removes it. Wash prints in warm water instead. The tradeoff: slightly more brittle prints and a disposal step — resin-contaminated wash water must be UV-cured before going down the drain.

Resin vapor is an organic compound — a dust mask will not filter it. The 3M 6502 half-facepiece with 60926 OV/P100 cartridges handles both resin fumes and sanding particulate. This is the standard setup hobbyists actually use. Cartridges last 6–12 months of regular hobby use.

Resin is a sensitizer: skin exposure without gloves can trigger an allergy that grows worse with each session. Nitrile (not latex) is resin-resistant — latex degrades and lets resin through. A 100-count box costs around $15 and lasts months of regular printing sessions.

UV cure lamps emit 405nm light — the same wavelength that cures resin and damages retinas with repeated exposure. These glasses (rated 200–400nm) are the $12 insurance policy against cumulative eye damage during curing. Regular sunglasses don't cover the right spectrum.

Support removal is the most satisfying step in resin printing with the right tool — and the most frustrating without one. Hakko CHP-170s are the hobbyist standard: sharp enough to clip support nubs flush without tearing the surface. Don't buy the $3 knockoff. Dull cutters leave divots that require sanding every time.

Wet-dry sandpaper in 400–3000 grit covers the full finishing progression: rough cleanup at 400, smoothing at 800–1500, polish at 2000–3000. Used wet, it lasts longer and produces less airborne particulate. A multi-grit pack costs a few dollars and covers months of prints.

A UV cure pen lets you spot-repair a cracked support nub, fill a layer gap, or reinforce a thin section without reprinting the whole model. Cure it under your UV lamp in 10 seconds. Saves prints that would otherwise go straight in the trash.