Polymaker™ HT-PLA Pro

Printing Temperature: 210°C - 230°C (230°C recommended for optimal performance)
Bed Temperature: 25°C - 65°C
Printing Speed: Up to 300mm/s
Fan: ON
Hardware Requirements: Standard brass nozzle (no hardened nozzle required); prints perfectly without an enclosure or heated chamber.

Direct Drive:
Retraction Distance: 1-3mm
Retraction Speed: 20-40mm/s

Drying Settings: 60°C for 6h
(Only if the material has absorbed moisture)

Annealing for Maximum Heat Resistance:
To achieve maximum temperature stability and unlock the peak HDT properties, anneal your printed parts at 100°C for 30 minutes.

Does it really need no enclosure?

No. HT-PLA Pro prints on any standard FDM printer with a standard nozzle. No heated chamber, hardened nozzle, or extra ventilation is needed.

Is it tougher than HT-PLA?

Yes. HT-PLA Pro has 2x the impact strength of HT-PLA and regular PLA, with improved layer bonding strength.

Is it UV-resistant?

Its UV resistance is on par with standard PLA. For sustained direct outdoor UV exposure, ASA is the better choice.

Is the surface finish matte?

No. It has a semi-gloss surface finish when printed at 230 °C. If you want a matte surface finish, you can print at 210 °C, but this may reduce strength.

Can I anneal it?

Yes. Please refer to the annealing guidelines for 3D-printed PLA parts.

• First, choose a suitable heating device for annealing. The best option is a temperature-uniform heating chamber, such as a forced-air drying oven. If you use a household oven, the side facing the heating elements may overheat and soften too much. To reduce this risk, wrap the part in aluminum foil. You can also use a water bath or oil bath, but avoid contact with the bottom of the container to prevent overheating and softening.
• Second, preheat the heating device to 100 °C. Once the target temperature is reached, preheating is complete.
• If space allows, keep the part attached to the printer bed and place the full assembly into the oven. Make sure the bed is at the bottom and the part faces upward.
• Annealing time depends on the thickness of the printed part:
  Less than 4 mm: 30-60 min
  6 mm: 1-2 hours
  8 mm: 2-4 hours
  10 mm: 3-6 hours
• After the required annealing time, let the part cool down in the oven before removal.
  The annealing process is then complete.
• The expected dimensional change after annealing is 0.3-0.6%, with slight differences between the XY and Z axes.
• If space is limited and the part must be removed from the build plate, do not remove the support structures. Place the part in the oven in its original printing orientation.
• Large or thick-walled parts are more challenging to anneal. Use a programmable oven where possible. First hold the part at 60 °C until the internal temperature is uniform, then heat quickly to 100 °C, or transfer it directly to a preheated 100 °C oven to reduce the risk of permanent deformation.