Print circuits,
sensors, and traces
right into the part.
ALT works with conductive 3D printing filaments, inks, and resins — carbon black, graphene, carbon nanotube, copper, and silver formulations — to embed electrical pathways directly into printed parts. We help you choose the right conductive material by resistivity, printability, and cost for sensors, EMI shielding, wearables, and embedded circuits.
No 3D printable conductive material matches solid copper wire — but the right formulation gets close enough to replace wiring, shielding, and sensors in low-power applications. ALT selects conductive filament, ink, or resin based on your resistivity target, resolution needs, and part geometry, not a one-size-fits-all default.
Printable materials that carry
electrical current, not just structure.
Conductive 3D printing materials combine a standard base polymer — PLA, ABS, TPU, or PETG — with conductive fillers such as carbon black, graphene, carbon nanotubes, or metal powders, so a printed part can conduct electricity while keeping the printability and mechanical properties of ordinary FDM material. Beyond filament, conductive inks and resins extend the same capability to finer traces and higher-resolution parts.
Carbon-based filament
Carbon black, graphene, and carbon nanotube fillers deliver low to moderate resistivity at a lower cost than metal composites — the default choice for shielding, antistatic parts, and basic sensors.
Metal-filled filament
Copper, silver, and nickel-filled filaments push resistivity closer to conventional electronics, at higher material cost and with trade-offs in brittleness and oxidation resistance.
Conductive inks & resins
Syringe or inkjet-deposited silver, PEDOT:PSS, and graphene inks, plus SLA/DLP conductive resins, reach far finer trace resolution than filament allows.
Conductive filament types ALT works with.
Each conductive filament family trades off resistivity, cost, and printability differently. Below is how the major categories compare, so you can match the material to your application rather than defaulting to the most expensive option.
Carbon black conductive filament
The most economical 3D printable conductive material. Moderate conductivity with good printability and mechanical properties — the standard choice when you don't need metal-level conductivity.
Graphene-enhanced conductive filament
Higher conductivity than carbon black, plus improved tensile strength, thermal conductivity, and chemical resistance — a strong middle ground before stepping up to metal-filled options.
Carbon nanotube (CNT) filament
The best-performing carbon-based option when nanotubes are properly dispersed in the polymer matrix — superior conductivity, mechanical strength, and durability for higher-performance parts.
Copper-filled filament
The highest conductivity among widely available conductive filaments — approaching conventional electronics resistivity. Susceptible to oxidation at high printing temperatures, and more brittle and costly than carbon-based filament.
Silver-filled conductive filament
Premium conductivity with excellent corrosion resistance, at a higher material cost than copper-filled options — best suited to critical applications where oxidation resistance matters.
Nickel-filled conductive polymer
Adds magnetic properties and good corrosion resistance at moderate conductivity — a specialized option when magnetic behavior matters as much as electrical conductivity.
Conductive inks, resins, and pure
metal printing for finer resolution.
Filament is good for large conductors but not fine structures. When a part needs high-resolution traces, sintered metal-level conductivity, or SLA/DLP compatibility, these material classes go further than any printable filament.
Direct-write conductive inks
Silver nanoparticle inks reach conductivities up to 9.72×10⁴ S/cm with low-temperature sintering around 110°C. Copper-based inks use copper-oxide precursors with reductive sintering for cost-effective, high-conductivity traces.
Conductive resins (SLA/DLP)
Silver-filled resins with up to 70 wt% silver-coated copper flakes reach conductivities up to 1000 S/cm without sintering. Graphene oxide resins print transparent and convert to conductive reduced graphene oxide during post-processing.
Pure metal 3D printing
EOS and Markforged offer >99.8% pure copper for high thermal and electrical conductivity applications. Silver-organic complex materials reach conductivities up to 55.71 S/cm; liquid-metal aluminum systems serve large-scale conductive parts.
Metallic gels
Gels combining micron-scale copper particles with liquid metal alloys reach up to 97.5% metal content, enabling high conductivity while printing at room temperature.
Flexible conductive elastomers
Silver, carbon nanotubes, and PDMS combine into stretchable conductive materials for wearables and soft, flexible electronic interfaces that need to bend and flex in use.
Advanced polymer composites
Research-grade formulations — 40 wt% carbon black polypropylene, locally-enriched CNT-filled PLA — push conductivity roughly eight orders of magnitude beyond conventional composites in lab conditions.
Choosing a printing technology for conductive parts.
Resistivity numbers on a spec sheet only tell part of the story. How a conductive material actually performs depends heavily on print orientation, layer adhesion, and which printing technology you're using — FDM, SLA/DLP, or direct-write.
ALT matches the technology to the application: FDM for accessible, low-cost conductive parts; SLA/DLP resin for higher resolution; and direct-write or inkjet deposition when circuit-level trace resolution is the priority.
FDM / FFF conductive filament printing
The most accessible technology for conductive 3D printing. Longitudinal printing lowers resistivity by aligning the conductive path; layer adhesion is critical for electrical continuity between layers; higher print temperatures generally improve conductivity but risk material degradation.
SLA/DLP conductive resin printing
Offers higher resolution than FDM, but conductive fillers can interfere with UV photopolymerization and require suspension additives to prevent particle settling. Often needs a post-print sintering or reduction step to reach optimal conductivity.
Direct-write and inkjet deposition
Capable of features down to the micrometer scale, and can combine conductive and insulating materials within a single print — ideal for rapid electronic circuit development and testing where filament resolution isn't fine enough.
Nozzle and hardware compatibility
Highly conductive, abrasive filaments — particularly metal-filled options — may require a hardened or upgraded nozzle to avoid excess wear during printing.
Where conductive 3D printing materials are used.
Conductive filament, ink, and resin serve applications wherever low-power circuitry, sensing, or shielding needs to be built directly into a part rather than assembled from separate components.
Why ALT for conductive 3D printing.
Picking a conductive material off a datasheet is easy. Picking the right one for your part's resistivity target, resolution needs, and print process is where most projects go wrong. ALT brings materials science and additive manufacturing expertise to that decision.
Material selection matched to your application
We start from your resistivity, resolution, and power requirements — not a default filament — and recommend carbon-based, metal-filled, ink, or resin accordingly.
Multiple printing technologies in-house
FDM, SLA/DLP, and direct-write/syringe deposition, so the technology is chosen for the part rather than the part being redesigned around a single available process.
Embedded sensor & circuit design experience
Beyond material selection, ALT designs the embedded circuit, sensor, or shielding geometry itself — not just prints a filament you supply.
Full-stack Physical AI integration
Conductive materials work developed here feeds directly into ALT's edge AI electronics and sensor fusion work — useful when your conductive part is one component of a larger intelligent system.
Common questions.
What engineers and product teams ask most about 3D printable conductive materials.
Need a part with embedded
conductivity or sensing?
Tell us your resistivity target, resolution needs, and part geometry — ALT will recommend the right conductive material and process.
Some of the conductive filaments available today are shown in the table below:
Table: Comparison of Conductive 3D Printing Filaments and their resistivity and cost
The Copper option in Multi3D is the only one approaching the resistivity of conventional electronics. You do need to consider also that Metal composites can be brittle, expensive, and oxidize over time and at high printing temperatures (Cu). In general, filament materials are not as conductive as copper wire or metal traces, but they’re useful for low-power circuits, sensors, and touch devices, EMI shielding, antistatic housings, ESD safe parts, enclosures, and wearable sensors. Improved resolution can be achieved through inkjet or other non-contact tools rather than filaments. Alternatively, paints can be applied to the surface of the part with materials such as Pedot:PSS, graphene inks, silver inks, or metals electroplated on the surface. Below, we show some silver traces that were printed with a syringe tool.
