Resin vs FDM for a first printer: decide on the workflow, not the detail shots

The core difference

An FDM printer melts plastic filament and lays it down layer by layer. A resin printer of the MSLA type cures liquid photopolymer with light. Chemical Insights, part of UL Research Institutes, studies both and notes that they produce different emission profiles: filament printers heat thermoplastics, while uncured resin can release VOCs even when a loaded printer is switched off [5].

For a buyer, the practical difference is the workflow after each print. A PLA part usually comes off the plate ready to use. A resin part comes off wet with uncured resin and needs washing and post-curing under UV light before it reaches its final properties, as Elegoo’s own quick-start guide describes [3].

What resin makers say about handling

Formlabs’ safety page for its Form Wash says resin may cause skin irritation or an allergic skin reaction, tells users to wear gloves when handling liquid resin or resin-coated surfaces, and warns that removing supports can send small pieces flying, so eye protection is worth considering [1]. It describes isopropyl alcohol as flammable and a skin and respiratory irritant, to be handled with gloves in a well-ventilated area and disposed of according to the safety data sheet and local authorities [1].

For its larger Form Wash L, Formlabs specifies operation in a room with at least three air exchanges per hour at 18–28 °C, and placement at least 0.9 m from other electrical equipment because of flammable vapours [2]. That instruction is for that specific washer, but it shows the scale of ventilation a resin maker considers normal around solvent washing.

Elegoo’s quick-start guide tells new owners to wear the gloves and mask from the packing kit, work in a well-ventilated area and use an air purifier, and to keep gloves on while washing models [3]. Chemical Insights adds a caution worth reading alongside that advice: standard dust masks are not effective against ultrafine particles or VOCs, and it recommends nitrile or neoprene chemical-resistant gloves for uncured resin and solvents [5]. A mask, in other words, should not be treated as the ventilation.

Consumables and running cost

Material price per kilogram is close between the two examples: Elegoo lists its Standard Resin at $18.99 per kilogram and Bambu lists PLA Basic refills at $14.99 [4][8]. Bambu's PLA Basic price was listed on 29 October 2026 and the other prices on 13 October 2026; confirm checkout. The difference is everything around the material. Resin printing adds gloves, wash liquid, paper towels and the time spent washing and curing, and failed prints and wash liquid must be disposed of according to safety data sheets and local rules [1].

Elegoo’s store sells water-washable resins as well as standard resin [4]. That can remove the alcohol step, but it does not remove the need for gloves, curing and disposal guidance for uncured resin [5].

Size and strength trade-offs

Resin printers in this price range typically have small build areas. The Mars 5 Ultra’s listed 153.36 × 77.76 × 165 mm volume is narrower in one direction than the A1 mini’s 180 mm cube [6][7]. That suits miniatures, small figures and detailed models, and rules out many household parts such as brackets, organisers and enclosures.

We have not tested part strength and do not rank either process. What the documents support is narrower: standard resin parts reach their final properties only after curing [3], and for functional parts that need heat resistance or toughness, FDM offers documented material choices such as PETG, ABS and ASA with published guidance [9].

Who should pick which

Pick FDM if your list is mostly practical parts, if the printer will live in a shared living space, if children are around, or if you do not want a chemical-handling routine. Pick resin if your main output is small detailed pieces, you have a ventilated room or garage within a sensible temperature range, and you are prepared to follow the glove, washing and disposal steps every time.

Fictional example: one reader wants tabletop miniatures, about 30 mm tall, and has a garage with a window. Resin fits that goal if the reader accepts the routine. Another reader wants shelf brackets, cable clips and a few toys for children; that list points to FDM, and the resin workflow would add risk and effort without a benefit.

• Do not set up a resin printer in a bedroom or kitchen.
• If resin reaches skin, wash it with plenty of soap and water, as Formlabs instructs, and follow the safety data sheet [1].
• Do not assume a water-washable resin is safe to pour down the drain; check the safety data sheet and local rules.
• Budget for a wash-and-cure station or an equivalent setup; bundles exist because the workflow requires one [6].

Sources & verification

Product details and prices can change. Check the linked provider before buying.

1. Formlabs: Safety with Form Wash Accessed 13 Oct 2026
2. Formlabs: Safety with Form Wash L Accessed 13 Oct 2026
3. Elegoo: quick start guide for resin 3D printers Accessed 13 Oct 2026
4. Elegoo US store: Standard Resin Accessed 13 Oct 2026
5. Chemical Insights (UL Research Institutes): 3D printing emissions Accessed 13 Oct 2026
6. Elegoo US store: Mars 5 Ultra with Mercury Plus V2.0 bundle Accessed 13 Oct 2026
7. Bambu Lab US store: A1 mini Accessed 13 Oct 2026
8. Bambu Lab US store: PLA Basic filament Accessed 13 Oct 2026
9. Bambu Lab Wiki: filament guide and material table Accessed 13 Oct 2026