Recycling 3D printer cartridges depends on what type you have. Filament spools, resin cartridges, and industrial FDM canisters each follow different paths, and some can’t be recycled through curbside programs at all. The good news is that manufacturer take-back programs, third-party services, and proper preparation can keep most of this waste out of landfills.
Filament Spools vs. Resin Cartridges
The recycling process differs dramatically based on your printing technology. Filament-based printers (FDM/FFF) produce empty plastic spools that are relatively straightforward to deal with. Resin printers produce cartridges contaminated with photopolymer chemicals that require careful handling before disposal. Knowing which category your cartridge falls into determines everything that follows.
Most filament spools are classified as #7 plastic, which is a catch-all category. That’s a problem because most municipal recycling programs only accept #1 and #2 plastics. Even though the spool itself is just plastic, your curbside bin probably won’t take it. The filament scraps and failed prints left over from FDM printing face the same limitation.
Resin cartridges are a different situation entirely. Uncured resin is considered potentially hazardous waste, meaning you can’t just toss the cartridge in the trash or recycling bin while it still contains liquid resin. A waste determination may be needed to confirm whether the contents qualify as hazardous under EPA guidelines.
How to Prepare Resin Cartridges for Disposal
In the United States, the EPA considers a resin cartridge “RCRA empty” once it contains less than 3% of its capacity (under 30 mL of resin). At that point, you can legally dispose of it with household waste. Getting a cartridge to that threshold, and handling it safely, takes a few steps.
Start by draining any remaining resin. Turn the cartridge upside down over a dedicated resin bottle of the same type, using a funnel to avoid spills. If you want to be thorough, you can cut the cartridge open with a hacksaw and let residual resin drip onto paper towels. Any surfaces that contact uncured resin should be wiped down with isopropyl alcohol.
Once the cartridge is emptied, expose any remaining resin residue to sunlight or a UV source until it fully cures into a solid. Cured resin is inert and safe for regular trash. If you rinsed the cartridge with solvent, that contaminated solvent needs to go into your chemical waste stream or be cured and disposed of separately. Never pour solvent or liquid resin down a drain.
For Formlabs Form 2, Form 3, and Form 3L cartridges specifically, remove the ID chip from the cartridge skirt before disposal. The chip should go with electronic waste, and the plastic skirt can then be recycled with household plastics. Newer Form 4 cartridges use RFID stickers instead, which don’t need to be separated.
Manufacturer Take-Back Programs
Stratasys runs one of the most established recycling programs in the industry, accepting all types of FDM canisters including Fortus Classic, Fortus Plus, Fortus 184 CI, and Fortus Xtend 500 models. The process works through prepaid FedEx shipping labels generated on their website.
For small returns of three to five canisters, bundle the original boxes together and tape them securely. For six or more, pack them into your own sturdy box. Each parcel can weigh up to 70 lbs (32 kg) and measure no more than 30 x 24 x 24 inches. Don’t include packing foam or other non-recyclable material in the box. If you’re returning 50 or more canisters, Stratasys has a separate large-returns process for palletized shipments.
Not all manufacturers offer take-back programs. Formlabs, for instance, provides detailed disposal instructions but doesn’t operate a cartridge return service. Check your specific manufacturer’s website before assuming a program exists.
Third-Party Recycling Services
TerraCycle sells a dedicated 3D Printing Materials Zero Waste Box that accepts spools and scrap printing material in a wide range of plastics: ABS, ASA, PS, HIPS, PP, PE, PET, PETG, PC, nylon, and TPU. A small box costs around $175. You fill it up, ship it back, and TerraCycle handles the processing. PLA filament is a notable exception. Because it’s biodegradable, it needs to go in TerraCycle’s separate Biodegradable Plastics box instead.
At that price point, the Zero Waste Box makes more financial sense for makerspaces, schools, or small businesses that accumulate waste steadily. For a hobbyist who goes through a handful of spools per year, the cost per cartridge is hard to justify unless avoiding landfill waste is a priority regardless of expense.
What Your Local Options Look Like
Since most filament spools are #7 plastic, curbside recycling is usually not an option. Some communities have drop-off locations that accept a broader range of plastics, so it’s worth calling your local waste management office. A growing number of recycling centers accept hard plastics even when they fall outside the standard numbered categories.
For resin waste that might be hazardous, your local household hazardous waste (HHW) collection facility is the safest bet. Most cities and counties run periodic HHW collection events or maintain permanent drop-off sites. Bring any uncured resin, contaminated solvents, or cartridges you’re unsure about. If you use solvents in your printing workflow, check them against the EPA’s four lists of hazardous chemicals (F, K, P, and U lists), as some require stricter handling.
The threshold for regulatory attention is surprisingly low. Generating just 2.2 lbs or more of acutely hazardous waste can trigger registration requirements in some states. That’s relevant for small businesses or labs running resin printers at volume, less so for hobbyists printing a few parts per month.
Reducing Cartridge Waste in the First Place
The 3D printing industry generates an estimated 5,000 tons or more of plastic waste annually, though exact figures remain unclear because tracking is limited. A few practical choices can reduce your personal contribution. Buying filament on cardboard spools instead of plastic ones eliminates the recycling question entirely, since cardboard goes straight into curbside recycling. Some filament brands now sell refill coils with no spool at all, designed for use with a reusable master spool.
For resin users, pouring leftover resin back into a storage bottle before it expires extends its life and reduces the number of partially full cartridges you need to deal with. Keeping cartridges sealed and stored away from light prevents premature curing that would make the remaining resin unusable and the cartridge harder to clean out.