Moving from FDM to resin: planning the additional equipment

What your filament setup can carry over, with conditions

A filament workshop already has a bench, lighting, power and finishing tools. Before assigning them a new use, compare each item with the instructions for the resin printer and material involved. For its SLA printers and post-processing units, Formlabs calls for a stable, level surface to reduce spills and contamination elsewhere. Treat your current bench as something to check: existing FDM use alone does not confirm that it suits the new equipment or resin workflow.

The less obvious items need an explicit check. A filament dryer, a hobby UV lamp or a household storage box should not be treated as suitable for resin post-processing unless their documentation or your resin's data sheet says so. The same caution applies to containers: the Formlabs TPM article notes that metal components may corrode over time in the water rinse, especially if scratched. The FDM vs resin guide covers choosing the process. This page assumes that decision is made and focuses on the transition.

A dedicated corner with stable footing and moving air

Your first purchase may be space rather than an object. Formlabs recommends designating a specific area for SLA printing, separate from other activities, and states that printers should not run in closed, unventilated spaces such as closets or small storage rooms. The same guidance explains that even though Formlabs resins do not require special ventilation, the printer and the wash unit should operate where air circulates freely so fumes and vapors do not build up.

For its products, Formlabs recommends a room whose ventilation provides at least three full air exchanges per hour; a window exhaust fan can increase that rate without replacing the existing system. This is Formlabs guidance for its SLA products, not a universal rule or a measurement of your room. The page also says to follow applicable local codes and keep the printer and wash unit where air circulates freely. Check the SDS and exact equipment instructions before deciding whether a chosen corner meets your needs.

Washing: solvent, containers and the water rinse

Washing changes the setup, but its workflow depends on the resin and solvent. In its TPM article, Formlabs describes an IPA alternative for washing some parts made on its SLA printers, used with the Form Wash, Form Wash L or Finish Kit. That procedure fills one container with TPM and a second with water; after drip-drying, parts are rinsed until the remaining TPM dissolves, or with clean IPA. The manufacturer also suggests a small amount of dish soap in that water rinse. Do not transfer these steps to another product without its documentation.

If you follow the Formlabs TPM procedure, plan for a solvent container and a separate water-rinse container; the Finish Kit buckets and Form Wash are the cited examples. For another resin, printer or washing method, start with its own instructions instead of assuming a water rinse is suitable. In the TPM context, Formlabs says the solvent can dissolve roughly three times as much resin as IPA before losing efficacy; a thin film left after washing signals that the bath should be replaced. The manufacturer also describes two-stage washing to extend its use and specifies a 0.962–1.000 specific-gravity range for measuring TPM concentration with a suitable hydrometer.

Drying and curing under the exact resin protocol

After the TPM rinse described here, Formlabs says to let parts drip-dry and then air-dry. Its table reports a waxy feel for named standard resins printed at 50 or 100 microns: the recommended post-cure removes it, while without that step the feel fades after about a week for the listed materials. This finding is neither a universal drying time nor a procedure for every resin. Check the post-processing instructions for the exact material, including whether a cure step is required.

One specific instruction covers the Form Cure and Form Cure L: their chambers do not vent air during operation, so TPM left on a part can evaporate and condense inside, occasionally clouding reflective surfaces. Formlabs therefore asks that parts washed with IPA, TPM or water be fully dry before entering these models. This documented rule for those chambers does not describe every curing station. Check your unit’s instructions and the cure time and temperature for the exact resin.

Protective gear and hot surfaces

Gloves are part of the equipment list, not an add-on. Formlabs calls for non-reactive nitrile or neoprene gloves to prevent skin contact with liquid resin and wash solvents, and says to wash any exposed skin promptly with soap and water. Safety glasses are recommended, particularly during post-processing, against resin, dust and support fragments. Long sleeves and long pants are advised, with work clothing washed routinely. Check glove compatibility for each exact resin and solvent against its SDS and the glove manufacturer’s data.

For respiratory protection, the Formlabs page ties its guidance to SDS exposure limits and insufficient ventilation, and also mentions sanding; wet sanding can reduce dust. It does not provide a universal mask or cartridge choice for every resin and solvent. Select respiratory protection from the relevant SDSs and a workplace assessment rather than assuming an N95 handles every solvent vapor. For hot surfaces, the cited examples are resin heating beneath the tank on some Formlabs models, curing chambers, and Fast Cure, for which the page specifies thermal-insulating gloves rated to at least 160 °C.

Waste, storage and budgeting the resin station

Include consumables and waste in the resin-station budget. Solvent gets replaced when saturated, the rinse water eventually holds too much TPM to stay effective, and Formlabs states that water and TPM exposed to resin must be disposed of in accordance with local regulations. The same applies to resin spills and solvent residue, which should be cleaned up promptly. The resin printing waste page covers what to look for in your area.

For storage, IPA evaporates rapidly and its vapors are flammable: Formlabs asks that bottles stay closed whenever possible and be kept away from heat, sparks and open flames. Check storage conditions for every other solvent in its own SDS and arrange a dedicated location for the products you use. To cost the transition, make your own list: printer, washing, curing where the protocol calls for it, PPE, solvents and waste disposal. Use your own figures and separate initial purchases from recurring expenses. The startup budget tool complements that preparation; keep a separate table for any items it does not represent. The total depends on your supplier and your print volume, not on a filament-to-resin comparison.

Sources and limits

• Safety with Formlabs SLA products | Formlabs
• Washing prints with TPM | Formlabs

We organize manufacturer and community documentation; we have not measured these products ourselves. The manual for your exact model takes precedence over general guidance.