colorFabb varioShore TPU review: adjustable softness for a patient tuning workflow
At a glance
A specialized option for experimenting with foamed flexible parts; the promising clamp-liner result came with a demanding calibration process.
The setup
- Actively foaming varioShore TPU; not varioShore TPU 85A, PEBA or Prosthetic.
- Captured Amazon offer: black 1.75 mm, 700 g.
Why consider it
- A promising pliable contact surface for a tool liner.
- Foaming gives an additional way to tune the finished feel.
What to weigh up
- Clean surfaces may require extensive calibration.
- Published profiles and older hardness labels need revision matching.
varioShore is worth considering when ordinary flexible filament does not give you the feel you want. Its distinguishing feature is active foaming: temperature and extrusion conditions change the finished material. That also makes the setup more involved than selecting a fixed-hardness TPU and pressing print.
The promising use is a contact surface
The detailed first-page experience describes a pliable tool-clamp liner with a pleasant contact surface after substantial tuning. That supports a modest workshop use case: experimenting with how a liner conforms to the object being held. It does not establish a certified grip, damping value or long-term compression rating.
| Choose a trial if… | Look elsewhere first if… |
|---|---|
| You want to adjust the feel of a noncritical liner or pad. | You need a finished part immediately from an unchanged TPU profile. |
| You can keep separate profiles for the foam behavior you like. | You require a specified compression-set or medical performance guarantee. |
Why copying the full settings list can disappoint
The captured X1E project used a tightly specified combination of flow, temperature, retraction and geometry choices. Its success is meaningful for that setup; copying only a temperature or flow percentage leaves out the rest of the experiment.
- Confirm the exact varioShore formulation and its current manufacturer profile.
- Use a small sample containing the intended contact face and thickness.
- Keep the geometry fixed while evaluating a controlled profile change.
- Save the resulting profile with the spool identity and intended part.
Why do the published settings differ?
Older colorFabb support guidance lists slower printing and a cooler bed than the current black-product page. The current page identifies the original line as TPU 95A, while an older data sheet uses 92A. Match the supplied product and current profile instead of mixing settings across documents.
Surface cleanup is part of the cost
The main drawback in the detailed experience is finding a narrow setting range that avoids numerous surface defects. That is particularly relevant for a contact liner: a part may need time-consuming cleanup even when it finishes printing. Budget calibration material and time before choosing it for repeated production.
There is no basis here for calling varioShore the only printable polyurethane foam or treating a workshop liner as evidence of prosthetic suitability. Its worthwhile buying case is narrower: control over feel, with a tuning commitment.
Pros & Cons Analysis
Based on supplied customer reviews and verified product documentation
Pros
- A useful specialty result. The detailed clamp-liner experience describes a conforming, non-marring surface after tuning. Consider it for a noncritical contact pad, while verifying that the finished part holds and releases as your application requires.
- The material offers another design variable. Manufacturer guidance describes active expansion governed by extrusion conditions. This creates room to experiment beyond wall and infill changes; it does not provide a guaranteed finished hardness from temperature alone.
Cons
- Calibration can dominate the first project. The successful liner account also describes difficult surface tuning and substantial cleanup outside its preferred settings. A good result is possible without making the process quick or broadly repeatable.
- Do not combine incompatible recipes. The original support page and current product instructions differ. Retain a profile tied to the exact roll and process rather than selecting the fastest value from each source.
Buy it for an experiment you can afford to tune
varioShore is a promising specialty spool for a carefully tuned liner or pad. Start small and let the finished contact surface decide whether the added process work is worthwhile.
I need predictable softness without much tuning
Begin with a conventional TPU grade suited to the desired feel. varioShore’s added flexibility in the process also adds calibration work.
I need a certified medical or load-bearing part
This review does not establish that suitability. A workshop success cannot replace the application-specific validation.
Frequently Asked Questions
Is the finished part always the hardness printed on the label?
No. Foaming and print geometry affect the finished response. Assess the intended section rather than treating a nominal material hardness as a guaranteed part property.
Technical Specifications
| Product type | Foaming flexible TPU filament |
|---|---|
| Formulation | Original colorFabb varioShore TPU; current black page calls it TPU 95A |
| Nominal Shore hardness | Current page 95A; older TDS 92A; finished hardness depends on process |
| Filament diameter | Selected 1.75 mm; exact page tolerance ±0.1 mm |
| Reviewed package | Black, 700 g |
| Manufacturer nozzle guidance | Current black product page 210–250°C; older support 190–250°C |
| Manufacturer bed guidance | Current black product page 40–60°C; older support 20–40°C |
| Feeding compatibility | Use exact printer profile; no automatic feeder suitability established |
| Drying and storage | Exact supplied revision drying instructions not verified |
SUNLU TPU 90A
SUNLU TPU 95A
PolyFlex TPU95-HF
PolyFlex TPU90