FFF filament

Filament selection for FFF printing

For a small workshop or small-scale production environment, the most relevant filaments are usually those that offer a good balance between availability, cost, printability, mechanical performance, and safety.

TL;DR

1. FFF filament overview for small-scale use

PLA

• Very common and easy to print
• Best for prototypes, visual models, low-stress parts, and educational use
• Not suitable for long-term outdoor exposure or strong heat exposure
• Avoid when parts sit in strong sunlight, hot vehicles, or near heat sources

PETG

• More durable than PLA and easier to use than many engineering plastics
• Good all-round material for functional parts, brackets, covers, fixtures, and general-purpose use
• Better heat tolerance than PLA
• Not as strong as some reinforced or high-performance materials

PCTG

• A tougher, more impact-resistant cousin of PETG in many practical use cases
• Often chosen when PETG is not quite enough for durability or impact performance
• Useful for enclosures, covers, brackets, and general-purpose functional parts
• Usually sits in the "more resistant" category alongside PC and PETG, but with a different balance of toughness and processability

ABS

• Tougher and more heat resistant than PLA
• Can be useful for parts requiring some thermal resistance
• More challenging to print reliably due to warping and odor concerns
• Be careful in enclosed or ventilated setups; not ideal for strong sun exposure or hot outdoor environments

ASA

• Good outdoor performance and UV resistance compared with PLA and many other common materials
• Often chosen for outdoor enclosures, signage, or semi-structural parts
• Better suited than PLA for sunlight exposure
• Still a practical step below the strongest engineering grades

FR / flame-retardant filaments

Flame-retardant (FR) materials are a special category intended for applications where ignition resistance or reduced flame spread matters. They are not a simple upgrade over standard materials; they are application-specific and usually more expensive, more demanding to process, and more sensitive to part design and print setup.

Examples of FR-oriented filament families and brands commonly mentioned in the market include:

• Polymaker PolyLite FR
• Forward AM Ultrafuse PLA FR
• 3DXTECH FireWire FR-PC
• ColorFabb FR materials in selected product lines

These materials can be relevant where safety or rating requirements matter, but they are not always the default choice for everyday prints. In small-scale workflows, they should be chosen when there is an actual flame or compliance requirement rather than just for general durability.

PET-CF (carbon-fiber reinforced PET)

• A different material family from carbon-filled PETG: PET-CF is a PET-based composite with carbon fiber reinforcement, not simply a modified PETG grade
• Offers improved rigidity, better dimensional stability, and often stronger thermal behavior than standard PETG
• Useful for brackets, housings, fixtures, and mechanical parts where stiffness matters
• Good if you want more rigidity without jumping to more exotic high-performance polymers

GF / glass-filled and CF / carbon-filled engineering materials

Glass fiber (GF) and carbon fiber (CF) additions are both useful for stiffness, heat resistance, and dimensional stability, but they have different strengths:

• CF-filled materials are often chosen for stiffness, low weight, and stronger thermal stability
• GF-filled materials are often chosen when stiffness and cost/performance balance matter, and they are often relevant in applications where electrical insulation or dielectric behavior is important
• In the electrical context, glass-filled materials are especially relevant because they can offer a stronger balance between mechanical rigidity and electrical insulation performance than some purely standard plastics

Side note on appearance: fiber-filled materials usually look visibly textured or slightly rougher than plain plastics, and fiber-filled surfaces often have a more matte, technical, and less smooth cosmetic finish. That is often acceptable for functional parts, but it is not the same aesthetic as smooth cosmetic PLA or polished PETG.

Side note on handling: CF/GF-filled materials are not meant to be handled continuously against bare skin. The fibers can transfer to the skin or be brushed onto it during part handling, especially when the part is still rough or abrasive. For repeated handling, gloves or a protective coating/finish are strongly recommended.

For a workshop, these are more advanced materials to evaluate when the part must be mechanically rigid and thermally stable rather than simply printable.

Nylon / PA

• Strong, tough, and useful for functional parts
• Commonly used where impact resistance and flexibility matter
• Can be more difficult to print because of moisture sensitivity and warping
• Often preferred for more demanding functional parts than basic PLA/PETG

PC (Polycarbonate)

• High strength and better heat resistance than many general-purpose materials
• Good for parts exposed to higher temperatures or needing stronger mechanical performance
• More difficult to print than PETG or ASA
• Typically not the first choice for low-cost small-scale setups unless there is a real need

TPU / TPE

• Flexible materials for seals, bumpers, grips, soft-touch parts, and vibration isolation
• Useful where impact absorption or flexibility is beneficial
• Not a default choice for rigid structural functions
• In practice, TPU is one of the most common flexible FFF choices for soft-touch or elastic parts, especially when you need rubber-like behavior rather than hard structural strength

PPS-CF as the practical upper limit

For a small-scale operation, PPS-CF sits at the upper end of what is realistically practical to consider. It offers:

• very high thermal resistance
• strong mechanical performance
• good dimensional stability
• useful chemical resistance

However, it also brings significant downsides:

• high cost
• difficult processing requirements
• more demanding machine and environment requirements
• often a poor fit for casual or low-volume workshop usage unless there is a serious need

In other words: PPS-CF is a useful benchmark for the upper boundary of capability, but it is not a general-purpose everyday material for a small-scale setup, and it is not something 3J Print Oudewater can deliver on with confidence. This does not mean it is entirely off the table, of course.

PEEK / PEKK / PEI (ULTEM-style)

• These are high-performance engineering polymers used in advanced manufacturing
• Excellent thermal, chemical, and mechanical performance
• Very demanding to print and expensive
• Generally outside the practical range of a small workshop or small-scale setup unless there is a clear industrial use case
• This is not something 3J Print Oudewater can deliver on

2. Filament selection questionnaire

Use the questions below as a quick decision tree for choosing a material.

Q1: Should it be outside or in the sun?

• If yes: avoid PLA
• PLA is not a good choice for long-term outdoor exposure or UV-heavy environments
• Prefer ASA, PETG, or more outdoor-capable engineering materials depending on the need

Q2: Should it be outside and in the sun?

• If yes: avoid ABS
• ABS is not a strong choice for direct sunlight and long-term outdoor service
• ASA is usually a better starting point for outdoor use

Q3: Should there be chemical resistance?

• If yes, consider material families such as:
• PETG for mild resistance and general use
• PCTG for a tougher, more resilient variation in the same general category
• Nylon / PA for better toughness and chemical resilience in many cases
• PC for stronger performance in more demanding environments

This is where the material choice starts to become application-specific.

Q3b: Does the part need to be rigid and/or load-bearing?

• If yes, then consider CF/GF-reinforced materials when stiffness and dimensional stability matter
• These materials are more appropriate for load-bearing or semi-structural parts than for purely decorative use
• For lightweight rigid parts, CF/GF-filled grades can be far more suitable than plain PLA or PETG
• If the part is not load-bearing and only needs a simple enclosure or cosmetic holder, a non-filled material is the better choice, unless you really like the look of it
• Extra handling caution applies: do not continuously handle the part against bare skin without gloves or a protective finish, and avoid brushing the surface repeatedly across exposed skin

Q4: Should there be thermal resistance?

• If yes, the material choice moves upward:
• PETG is better than PLA
• PCTG may be worth considering when you need more durability than basic PETG
• ABS may help for moderate heat exposure
• ASA offers better weather resistance and practical heat tolerance
• PC becomes relevant for stronger thermal demand

Q5: Should there be flame resistance?

• If yes, then look at FR-rated specialty materials rather than standard commodity filaments
• Flame-resistant requirements generally push the decision toward engineered polymers and specialized grades
• Typical examples include FR-PLA and FR-PC lines from vendors such as Polymaker, Forward AM, and 3DXTECH, but local availability and compliance requirements must be checked carefully
• This usually means a more expensive and more demanding material selection

Q6: Should there be electrical resistance / insulation needs?

• If yes, then move toward materials that are known for dielectric performance or engineered insulation requirements
• Glass-fiber filled grades are worth considering where stiffness and electrical insulation are both relevant
• Carbon-fiber or glass-fiber filled engineering polymers can be helpful for more demanding mechanical and thermal loads, especially when the part also needs electrical robustness
• Common choices will depend strongly on the exact electrical environment, but this is where material grade and application testing matter more than standard shop defaults
• For serious electrical applications, the material decision should be validated against the actual voltage, temperature, and chemical environment

3. Filament color finders and lookups

The following websites are useful for checking color availability, brand compatibility, and general material lookup:

• https://filamentcolors.xyz/
• https://filascope.com/colors
• https://spoolhound.com/colors
• https://filamentfinder.thinkonezero.com/
• https://3dfilamentprofiles.com/filaments

4. Important notice on brand availability and cost

Some filament brands are either:

• limited to the US market
• difficult to source reliably in the EU
• or significantly more expensive to obtain in Europe due to shipping, tariffs, or region-specific distribution

This matters especially for more specialized engineering materials such as higher-end CF-filled or high-temperature grades. Always check local availability, shipping cost, and compatibility before choosing a material for production use.

5. Short practical recommendation

For a small-scale setup, the realistic and useful ladder is:

• PLA and ABS for relatively cheap, easy prototypes and visual parts
• PETG or PCTG for general functional use and more durable parts
• PETG, PCTG or ASA for outdoor exposure
• TPU for flexible or soft-touch parts
• GF-filled or CF-filled engineering grades when stiffness and thermal behavior matter
• FR grades where flame resistance is a real requirement
• Nylon / PA or PC for more demanding functional work
• PPS-CF as the top-end boundary of capability, not the default choice

This keeps the workflow practical without overshooting into materials that are expensive, difficult, or over-specified for most lower-volume projects.