Filament guideOverhangs, undercuts and floating details all need something underneath them while they print. That temporary scaffolding is called support. Printed in the same plastic, it can leave rough scars on the surfaces you care about most. Dedicated support materials fix that.
Quick answer
The short answer
Support materials are filaments used only for the scaffolding, or just the thin layer where it touches the part. They're chosen because they don't bond strongly to the model, so they come away cleanly.
Bambu Lab makes four: PVA, which dissolves in water, and three breakaway supports matched to PLA/PETG, ABS and PA/PET.
01
How support materials work
The key spot is the support interface: the few layers right where the support meets the part. If that layer is a different material that barely sticks, the support lifts off and leaves a smooth surface.
Most of the support structure can still be printed in the model's own material. Only the interface uses the special filament. Bambu notes this saves material and time.
02
Bambu's four support materials
| Support | Best with | How it comes off |
|---|---|---|
| PVA | PLA, PETG, PLA-CF/GF, PETG-CF/GF | Dissolves in water |
| Support for PLA/PETG | PLA, PETG | Breaks away by hand |
| Support for ABS | ABS | Peels off; also dissolves in limonene |
| Support for PA/PET | PAHT-CF, PA6-CF, PET-CF, PA-GF | Removed by hand |
03
PVA: the dissolvable one
PVA is a water-soluble filament. After printing, the part soaks in water and the support washes away. Bambu says warm water speeds this up. For PLA parts, the water should stay at or below 50°C (122°F) so the model doesn't deform.
It doesn't need to dissolve fully. Partly softened support can be pulled off by hand. PVA is the right call for supports trapped inside a shape, where nothing can reach to break them away.
The catch is moisture. Bambu says PVA must be stored below 20% humidity, and filament that turns soft or sticky needs drying again.
04
The breakaway supports
- Support for PLA/PETG breaks away without tools and leaves a smooth interface. Bambu says it is for the interface only, not for printing models. Use it with PLA and PETG.
- Support for ABS is designed to come off ABS easily. Bambu says it supports zero gap at the interface, for a scar-free surface and sharper detail.
- Support for PA/PET pairs with engineering materials like carbon fiber nylon and PET-CF. Bambu recommends removing it promptly after printing.
05
When it's worth it
- Figures and sculptures with faces, hands or drapery that face downward
- Product models where every surface shows
- Parts with internal channels or enclosed cavities (PVA)
- Mechanical parts where a support scar would affect fit
For simple shapes, or surfaces that won't be seen, regular supports are often fine. A second material adds print time, so we use it where the finish pays off.
06
Designing with supports in mind
Tell us which surfaces are visible and which can be hidden. We'll orient the part to keep supports off the faces that matter.
Where you can, add chamfers under overhangs and split large pieces into parts that print flat. Fewer supports usually means a cleaner result.
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Support materials at IMPRESO
We print with PVA and Bambu's breakaway supports in-house at our studio in Ridgewood, Queens. Tell us how the piece will be used and which sides will show, and we'll recommend the right approach. Every job is quoted individually.
Start a 3D project
Send us your file, a sketch or just the idea. We'll plan the supports, pick the materials and send a quote.
Start a 3D project → See 3D printing →More guides
