Learning and display models
PLA is usually the easiest starting point and gives clean detail with modest hardware needs.
Filament Reference
Filament Types and Hardware Guide
Start with what the finished part must do, then confirm that your printer has the nozzle, temperature range, bed surface, enclosure, ventilation, and moisture control the filament requires.
Quick Starting Points
Choose by intended use
Hardware requirements includedPlain-language comparisons
Durable everyday parts
PETG adds toughness, moisture resistance, and better heat tolerance than standard PLA.
Flexible parts
TPU suits grips, bumpers, seals, and parts that must bend or absorb impact.
Outdoor or higher heat
ASA, PA, or PC may fit the job, but they require more equipment and print control.
Check the spool before printingFilament blends vary by manufacturer. Use the temperature, drying, ventilation, and build-surface instructions supplied with the exact filament—not just the general family name.
Common Filament Families
Uses and hardware requirements
| Filament | Good for | Starting level | Hardware and handling | Watch for |
|---|---|---|---|---|
| PLA | Display models, toys, prototypes, organizers, and detailed prints used indoors. | Beginner | Standard nozzle; heated bed helpful but not always required; no enclosure normally needed. | Can soften in a hot car or direct heat and may become brittle over time. |
| PETG / PCTG | Durable household parts, containers, brackets, and items exposed to moisture. | Beginner+ | Standard nozzle and heated bed; a suitable release layer may protect some smooth build surfaces. | Stringing, nozzle buildup, and excessive bonding to some plates. |
| TPU / Flexible | Grips, bumpers, feet, seals, protective parts, and flexible joints. | Intermediate | Direct-drive extruder preferred; 0.4 mm or larger nozzle; dry filament carefully. Standard nozzle is suitable for unfilled TPU. | Soft filament can buckle if printed too fast; moisture causes bubbles and stringing. |
| PVA / BVOH | Water-soluble supports for complex models and hard-to-reach internal areas. | Intermediate | Multi-filament printer or toolchanger; standard nozzle; dry box and sealed storage strongly recommended. | Absorbs moisture quickly and must be compatible with the model filament. |
| ABS | Tough functional parts, housings, and parts needing more heat resistance than PLA. | Advanced | Enclosure or U1 Top Cover, heated bed, suitable build surface, and effective ventilation. Standard nozzle is suitable when unfilled. | Warping, shrinkage, odor, and emissions; follow the filament safety guidance. |
| ASA | Outdoor housings, fixtures, signs, and functional parts needing UV and weather resistance. | Advanced | Enclosure or U1 Top Cover, heated bed, suitable build surface, and effective ventilation. Standard nozzle is suitable when unfilled. | Warping and emissions; keep chamber conditions stable. |
| PA / Nylon | Wear-resistant gears, hinges, bushings, strong functional parts, and parts needing some flexibility. | Advanced | Dryer or active dry box, enclosure or U1 Top Cover, high-temperature-capable hotend and heated bed. Hardened nozzle if fiber-filled. | Absorbs moisture rapidly and can warp; blends have very different requirements. |
| PC / Polycarbonate | High-strength, high-heat functional parts and protective components. | Advanced | Enclosure or U1 Top Cover, high-temperature-capable hotend, hot bed, dry filament, and suitable build-surface preparation. | High temperatures, strong warping forces, and demanding bed adhesion. |
| Carbon- or Glass-Fiber Filled | Stiff functional parts, fixtures, tooling, and dimensionally stable components. | Advanced | Hardened nozzle required. A 0.6 mm nozzle often reduces clog risk. Enclosure and drying needs follow the base polymer. | Abrasive fibers wear standard nozzles; printed surfaces can expose fibers. |
| Glow, Wood, or Metal Filled | Decorative models, props, signs, and specialty surface finishes. | Intermediate | Hardened nozzle recommended for abrasive blends; a larger nozzle may reduce particle clogs. Follow the base filament’s needs. | Particles can clog small nozzles and wear standard metal nozzles. |
Linked Filament Details
PETG
PVA
CF
Full technical names, positive properties, and limitations
Select an underlined filament name in the chart above—or open a description below. Properties can change significantly between brands and blends.
PLAPolylactic AcidCommon beginner and display filament
Positive properties
- Easy to print with low warping
- Good detail and surface finish
- Widely available in many colors
- Usually needs no enclosure
Negative properties
- Low heat resistance
- Can be brittle under impact
- Not ideal for long-term outdoor use
- May creep under a constant load
PETG
PCTGGlycol-Modified Polyethylene Terephthalate / Glycol-Modified Polycyclohexylenedimethylene TerephthalateDurable general-purpose copolyesters
Positive properties
- Tougher and less brittle than PLA
- Good moisture and chemical resistance
- Useful layer adhesion
- PCTG blends can offer additional impact resistance
Negative properties
- Can string and collect on the nozzle
- May bond too strongly to some plates
- Fine details can be softer than PLA
- Requires careful cooling and temperature control
TPUThermoplastic PolyurethaneFlexible, impact-absorbing filament
Positive properties
- Flexible and resilient
- Excellent impact and abrasion resistance
- Good for grips, seals, and bumpers
- Available in different hardness ratings
Negative properties
- Must print more slowly
- Soft filament can buckle during feeding
- Absorbs moisture
- Bridging and supports can be difficult
PVA
BVOHPolyvinyl Alcohol / Butenediol Vinyl Alcohol CopolymerWater-soluble support filaments
Positive properties
- Dissolves in water
- Supports inaccessible model areas
- Enables complex internal geometry
- Can leave cleaner supported surfaces
Negative properties
- Very moisture-sensitive
- Requires sealed dry storage
- More expensive than model filament
- Must bond and print compatibly with the paired filament
ABSAcrylonitrile Butadiene StyreneTough, heat-resistant engineering plastic
Positive properties
- Good toughness and impact resistance
- Better heat resistance than PLA
- Can be machined and chemically smoothed
- Useful for housings and functional parts
Negative properties
- Prone to warping and shrinkage
- Needs stable enclosure temperatures
- Produces odor and emissions
- Limited ultraviolet resistance outdoors
ASAAcrylonitrile Styrene AcrylateWeather-resistant engineering plastic
Positive properties
- Good ultraviolet and weather resistance
- Useful heat and impact resistance
- Suitable for outdoor housings
- Durable finished surface
Negative properties
- Prone to warping
- Needs an enclosure and stable temperature
- Produces emissions requiring ventilation
- More demanding bed adhesion than PLA or PETG
PAPolyamide, commonly called NylonWear-resistant functional filament
Positive properties
- High toughness and fatigue resistance
- Good wear and low friction
- Useful for gears, hinges, and bushings
- Can flex without cracking
Negative properties
- Absorbs moisture very quickly
- Can warp significantly
- Often requires drying while printing
- Properties vary greatly among PA blends
PCPolycarbonateHigh-strength, high-temperature filament
Positive properties
- High impact strength
- Excellent heat resistance
- Useful toughness and rigidity
- Suited to demanding functional parts
Negative properties
- Requires high nozzle and bed temperatures
- Strong tendency to warp
- Needs an enclosure and dry filament
- Difficult build-plate adhesion and release
CF
GFCarbon-Fiber- or Glass-Fiber-Reinforced Polymer CompositeA reinforced version of a base plastic
Positive properties
- Greater stiffness than the base polymer
- Often improved dimensional stability
- Reduced warping in some blends
- Matte technical surface finish
Negative properties
- Abrasive—hardened nozzle required
- Often more brittle than the base polymer
- Can clog smaller nozzles
- Must follow the base polymer’s drying and enclosure rules
FILLEDParticle-Filled Thermoplastic CompositeGlow pigment, wood fiber, or metal-powder blend
Positive properties
- Distinctive visual and tactile finishes
- Can imitate wood, stone, or metal
- Useful for props and decorative work
- Some blends allow special post-processing
Negative properties
- Particles can clog smaller nozzles
- Many blends are abrasive
- Usually weaker than the unfilled base plastic
- Hardware needs vary with filler and base filament
Color and Light
Transmission Distance matters in layered color prints
What TD means
Transmission Distance (TD) describes how much light passes through a filament color as printed layers build up. HueForge uses it to help predict how stacked colors will appear.
Lower versus higher TD
A lower TD becomes visually opaque in fewer layers. A higher TD allows the colors underneath to affect the result through more layers.
Use an exact match
TD can change with the filament manufacturer, product line, color, and finish. Use a measured value for the exact filament whenever one is available; do not assume two similar-looking colors have the same TD.
When TD mattersMost ordinary single-color and multicolor models do not require a TD value. It is mainly useful for HueForge artwork and other thin, layered prints that create color by controlling how light passes through stacked filament.
Snapmaker U1 Hardware Key
What the U1 supports
Standard U1
Snapmaker lists PLA, PETG, TPU, PVA, and PCTG as basic filament compatibility. The supplied hotends use 0.4 mm stainless-steel nozzles.
With the optional Top Cover
The supported list expands to PET, ABS, ASA, PA, and PC by providing a warmer, more stable enclosed environment.
With Top Cover and hardened hotends
Snapmaker adds carbon-fiber- and glass-fiber-reinforced polymers. Use the correct hardware on every toolhead assigned an abrasive filament.
Safety mattersAn enclosure or filter does not replace the filament manufacturer’s safety instructions. Review the spool’s safety data and provide suitable ventilation, especially for higher-temperature filament types.
Reference Basis
Confirm the exact filament before printing
This chart uses published filament guidance and the Snapmaker U1’s official compatibility categories. Manufacturers can change a blend, so the spool-specific instructions remain the final authority.