How to Choose a Resin 3D Printer: Decision Tree 2026

What are the key criteria for choosing a resin printer?

The five essential criteria are: build volume size, XY resolution (18–50 μm), print speed (90–150 mm/h), total cost of ownership, and compatible resin type (water-washable vs IPA).

After years of watching people buy the wrong printer, I'll be straight with you: 80% of the frustration comes from not thinking through these factors before pulling out your wallet. Resolution is the first thing everyone looks at, but trust me — a small build volume will drive you crazy long before a few extra microns ever will.

The washing situation is a bigger deal than most people realize upfront. If you're working in a small apartment without dedicated ventilation, isopropyl alcohol (IPA) can become a real headache. Water-washable resins solve that problem, but they cost more and not every printer handles them equally well.

Print speed matters if you're running longer batches. The Elegoo Mars 5 Ultra for miniatures hits 150 mm/h according to official specs, while more basic models typically land in the 40–80 mm/h range. Keep in mind — those top speeds require a dedicated high-speed resin. With standard resin, expect closer to 90 mm/h.

What size parts do you need to print?

For 28–32mm miniatures and small parts, a build volume of 130x70x150mm is plenty. For busts, helmets, or mid-size prototypes, you'll want at least 200x120x200mm.

The most common mistake I see is buying a compact printer thinking "I'll upgrade once I get the hang of it." Spoiler: you end up buying a second one within six months. Standard tabletop miniatures run 28–32mm tall, and with a Mars 5 Ultra's 153.36 x 77.76 x 165mm build plate, you can fit an entire squad in a single print run.

If cosplay helmets or functional prototypes are your goal, go straight to the Elegoo Saturn 4 Ultra mid-format. With twice the surface area of a Mars, you skip the tedious process of splitting models and gluing them back together.

One tip most people overlook: measure the largest object you want to print and add 20% to each dimension. That gives you the real minimum build volume you need, accounting for supports and working room.

How much do you want to spend on your resin printer?

Your realistic total budget should cover: printer (£200–600), wash and cure station (£100–200), starter resin (£30–50), safety gear and consumables (£50–80). Realistic minimum total: £400–500.

Let's be honest — the printer price tag is just the starting point. I've seen too many people buy a cheap Photon D2 only to realize they need another £200 in accessories just to work safely. The Mars 5 Ultra at £279 looks expensive next to £150 models, but it includes features you'd otherwise pay for separately.

A wash and cure station is essentially non-negotiable. Sure, you can make do with tupperware containers and a UV lamp, but after the third time you've spilled IPA all over the bathroom, you'll wish you'd spent that extra £150 upfront. The Elegoo Mercury XS Bundle and similar stations save you serious time and hassle.

• Entry-level printers (£150–250): Anycubic Photon D2, Mars 3
• Mid-range (£250–400): Mars 5 Ultra, Photon Mono M7
• Large format (£500–800): Saturn 4 Ultra 12K, recent 14K models

Do you prioritize print speed or maximum detail?

For miniatures and jewelry, prioritize XY resolution under 25 μm. For prototyping and production, print speeds of 120+ mm/h combined with strong light uniformity (90%+) will deliver more value.

Resolution is partly a marketing trap. Anycubic boasts 16.8 μm in X on the Photon Mono M7, but in practice, the difference between 18 μm and 25 μm is imperceptible on 90% of prints. What you will notice is waiting 8 hours instead of 4 for the same part.

Light uniformity matters more than raw resolution. The Mars 5 Ultra advertises 92% uniformity with its COB system, while traditional LCDs typically hover around 80-85%. This means fewer failures at the edges of the build plate and more consistent layers.

For production or iterative prototyping, every minute counts. A Saturn 4 Ultra 16K high-detail printer might seem like overkill with its 19x24 μm resolution, but if you charge per finished piece, the speed pays for the investment fast.

Do you need water-washable resin or standard resin with IPA?

Water-washable resin is ideal for enclosed spaces and beginners (no harsh chemicals), but costs 40-60% more. Standard IPA-based resin offers better mechanical properties and more variety.

I work in a well-ventilated workshop, so IPA is no issue for me. But if you print at home — especially with kids or pets around — water-washable resin is almost a must. IPA is flammable, the fumes are unpleasant, and you need to handle chemical waste disposal.

The compatible resins for beginners include options from both categories. Quality has improved a lot — early water-washable resins were brittle, but current formulas hold up well under normal use. That said, for mechanical parts or anything requiring flexibility, I still prefer standard ABS-like resin.

One important note: not all printers handle water-washable resins the same way. Some require longer exposure times. The resin parameter calculator helps you dial in the settings for your specific printer and resin.

Anycubic vs Elegoo: which resin printer brand is better?

Elegoo stands out for value and a complete ecosystem (printer + wash station + their own resins). Anycubic brings more technical innovation (DLP, massive build volumes) but with less consistent customer support.

After years in this hobby, my take is clear: Elegoo is the safer bet. Their ecosystem is well-rounded — printer, Mercury wash and cure station, optimised resins, and support that actually responds. Anycubic innovates more (they were pioneers with accessible DLP in the Photon D2), but their after-sales support is hit or miss.

On paper specs, they're very close. The Photon Mono M7 boasts a minimum 90% light uniformity and 16.8 μm X resolution. The Mars 5 Ultra counters with 92% uniformity and 18 μm. In practice, both print with outstanding quality.

The real differences come down to the details: - Elegoo has better quality control (fewer defective units out of the box) - Anycubic is often 10-15% cheaper during sales - Elegoo's software (customised ChituBox) is more stable - Anycubic offers more format variety (from mini to XXL build volumes)

When should you NOT buy a resin printer?

Avoid resin printing if: you don't have a ventilated space, you're sensitive to chemicals, you need large parts (30cm+), you're after heat-resistant engineering materials, or you can't commit time to post-processing.

Resin printing is not plug-and-play like FDM. Every print needs washing, curing, and support removal. If you want to print and use parts straight away, FDM is the better option. Resin excels at detail — not convenience.

Space is critical. You need at least 2m² of well-ventilated workspace to stay safe. I've seen people printing in closed bedrooms — bad idea. Resin fumes, even from "eco" resins, can cause sensitization over time. An exhaust fan or open window isn't optional.

For mechanical parts that need to be durable or withstand temperatures above 60°C, FDM with ABS or PETG still wins. Standard resin warps above 60°C, and heat-resistant resins cost three times as much. If you're making outdoor enclosures or engine parts, go straight to FDM.

Decision table: recommended printer by use case

Frequently asked questions about choosing a resin 3D printer

Is buying a used resin 3D printer worth it?

It depends on the model and its history. LCD screens have a limited lifespan — mono screens are typically rated around 2,000 hours according to specs. If you're buying used, ask about hours of use and request a test print. DLP models like the Photon D2, with its 20,000-hour projector life, age much better. Personally, I prefer buying new with a warranty for the peace of mind.

What accessories do you actually need when starting out?

Beyond the printer itself: nitrile gloves (never latex), UV safety glasses, wash containers, paper towels, plastic scrapers, resin strainers, and a ventilated workspace. A wash-and-cure station saves time, but you can get started with manual methods. An activated carbon air purifier is highly recommended if you're printing indoors.

How far does a litre of resin go?

With a typical density of 1.1 g/ml, yield varies depending on what you're printing. For hollowed 32mm miniatures, you can get around 100–150 per litre. Busts or solid parts use significantly more. Always hollow out large models to save resin and reduce cure times.

Are resin printers loud?

Much quieter than FDM. The only noise is the Z motor moving up and down, similar to a desktop inkjet printer. The Photon D2 is rated at 35 dB — practically silent. If a model has a fan, that can be slightly more noticeable. In general, you can print overnight without disturbing anyone.

Do I need a powerful computer to prepare files?

For simple models, any PC from the last five years will do. For complex files with millions of polygons or when auto-generating supports, you'll appreciate 8GB+ of RAM and a decent processor. Slicing itself is fast — the heavy lifting is manipulating large STL files.

Can you switch between different types of resin without issues?

Yes, but make sure you clean the vat thoroughly between changes. Mixing standard resin with water-washable resin can cause curing problems. When switching colours, leftover residue can tint your next prints. Many users keep multiple FEP vats on hand for quick swaps. A spare vat costs around £20–30 and is well worth it if you change resins frequently.

Happy printing! 😎

ELEGOO Mars 5 Ultra

After weighing up every factor in our decision guide, the ELEGOO Mars 5 Ultra stands out for delivering speed and precision without the hassle. Its ideal balance of ease of use and professional-quality results makes it a smart choice for taking your projects to the next level.

279.00€ View in store →