Why Annealing High-Temp Filaments Is Not the Same as Annealing PLA Annealing PLA is well-understood — heat the print to 80-100 C, let it crystallise, accept 1-3 percent shrinkage, gain heat resistance up to roughly 110 C. The technique scales poorly to engineering filaments. PA-CF (carbon-filled nylon), PEEK, and PEI all anneal at much higher…
Why Transparent PETG Is Harder Than It Looks “Just print it in clear PETG” is one of the most repeated and least useful pieces of advice on 3D printing forums. The phrase implies transparent prints are a solved problem in 2026, and they are not. A direct print in transparent PETG produces an output somewhere…
What Carbon Fiber Filament Actually Is in 2026 “Carbon fiber filament” describes a family of composites in which short chopped carbon strands are mixed into a base polymer at fill rates between 10 and 25 percent by weight. The fibres are typically 100 to 200 micrometres long — too short to span a layer, but…
Why TPU Print Speed Is Mostly a Pressure Problem TPU is not slow because TPU is sticky. TPU is slow because every change in extrusion rate has to push the filament through a soft section between the extruder gear and the hotend, and that soft section behaves like a spring. When the slicer asks for…
Why “Heat Resistant” Filament Marketing Lies for Automotive Use When a filament spool is marketed as “heat resistant” for automotive use, the temperature claim on the box is almost always the glass transition temperature (Tg), not the continuous service temperature. These two numbers are very different in practice. PLA-HT advertises 95°C Tg but starts deforming…
Where PETG Outdoors Actually Works — and Where It Doesn’t PETG sits in an awkward outdoor niche. It is cheaper than ASA, easier to print than ASA, and has decent UV resistance compared to PLA, but it is not weatherproof in the same way ASA or polycarbonate are. The honest answer to “can I use…
What “High Temperature Filament” Actually Means in 2026 The phrase “high temperature filament” gets used for everything from heat-resistant PLA to PEEK, which is unhelpful because those materials live in different worlds. A useful definition: a high temperature filament is one whose part stays dimensionally stable above 80 degrees Celsius — the temperature inside a…
Why Matte PLA Is a Different Conversation Than Regular PLA Matte PLA is not just regular PLA with a different surface texture. The matte finish comes from a proprietary additive (typically a fine mineral filler or a wax-based dispersion) that changes the filament’s flow characteristics, surface finish, layer adhesion, and printability in ways that distinguish…
The 12-Month Side-by-Side ASA vs PETG Outdoor Test The marketing pages for ASA and PETG both claim suitability for outdoor parts, and the technical datasheets both list UV resistance ratings that imply multi-year service life. The hobbyist trying to print outdoor brackets, garden fixtures, or planter accessories has a hard time choosing between them based…
Why TPU Print Speed Benchmarks Are Not All Equal “This TPU prints at 80 mm/s” is a common claim that means almost nothing without context. TPU print speed depends on the filament’s Shore hardness, the printer’s extruder geometry (direct drive versus Bowden), the hot end’s thermal mass, the layer height, and the part’s geometry. A…