Answer to Frequently Asked

What nozzle size should I use?
UltraDry PETG prints reliably with a 0.4–0.6 mm nozzle. Larger diameters (0.6–0.8 mm) improve flow and reduce back‑pressure for CF/GF blends.

Do I need a hardened steel nozzle?
For CF and GF materials, yes — use hardened steel, ruby, or tungsten carbide.
Standard UltraDry PETG can run on brass without accelerated wear.

What bed temperature works best?
Typical range: 70–85°C.
Higher temps improve adhesion for large parts or engineering‑grade blends.

Do I need an enclosure?
Not required, but recommended for:

• large parts
• CF/GF materials
• parts requiring maximum layer adhesion
  A stable thermal environment improves dimensional accuracy.

What retraction settings should I start with?
Begin with low retraction (0.6–1.2 mm direct drive, 2–4 mm Bowden) and slow speeds (20–35 mm/s).
UltraDry PETG flows cleanly and does not need aggressive retraction.

How strong is UltraDry PETG compared to standard PETG?
UltraDry PETG maintains higher layer adhesion, cleaner extrusion, and more consistent mechanical properties due to controlled moisture stability.

What’s the difference between CF, GF, and standard PETG?

• CF PETG — highest stiffness, best dimensional stability
• GF PETG — improved impact resistance and temperature stability
• Standard PETG — balanced strength, clarity, and ease of printing

How heat‑resistant are the engineering blends?
CF and GF blends offer higher heat deflection than standard PETG.
Exact values depend on geometry and print settings.

Does UltraDry PETG absorb moisture?
UltraDry PETG is produced using the DryFusion™ process, which stabilizes moisture content before extrusion. It resists moisture uptake significantly better than typical PETG.

Do I need to dry UltraDry PETG before printing?
No. UltraDry PETG is conditioned and stabilized during the DryFusion™ process and arrives ready to print.
For long‑term stability after opening, store the spool with an UltraDry™ desiccant pouch to maintain the controlled environment it was produced in.

How long does UltraDry PETG stay stable after opening?
Under normal indoor conditions, UltraDry PETG maintains stable performance for weeks to months.
For best results, keep the spool in a sealed bag or dry box with an UltraDry™ desiccant pouch or UltraDry™ humidity card to preserve the low‑moisture environment.

Can I dry UltraDry PETG if I want to?
Yes — it won’t harm the material.
Typical drying range: 60–65°C for 4–6 hours.
After drying, store the spool with UltraDry™ desiccants to prevent re‑absorption.

Does moisture affect mechanical performance?
Yes — moisture can reduce layer adhesion and surface quality in typical PETG.
UltraDry PETG resists moisture uptake, but storing it with UltraDry™ desiccants ensures maximum consistency for engineering‑grade parts.

When should I choose CF PETG?
Use CF PETG for:

• structural brackets
• jigs and fixtures
• parts requiring stiffness and dimensional accuracy

When should I choose GF PETG?
Use GF PETG for:

• impact‑resistant parts
• enclosures
• components exposed to heat or vibration

Is UltraDry PETG good for functional parts?
Yes — it’s engineered for real‑world mechanical performance, not just visual prints.

Can I use UltraDry PETG for outdoor applications?
Yes. PETG offers strong UV and weather resistance.
CF/GF blends improve thermal stability outdoors.

Why am I seeing stringing?
UltraDry PETG normally prints cleanly.
If stringing appears after long storage, check your environment and refresh the spool with a new UltraDry™ desiccant pouch to restore optimal moisture levels.

Why is my first layer inconsistent?
Check:

• bed temp (70–85°C)
• Z‑offset
• clean PEI or textured plate
  UltraDry PETG adheres well when the surface is clean.

Why do I see layer lines or micro‑banding?
Lower print speed to 40–60 mm/s and ensure the printer frame is rigid.
CF/GF blends naturally reduce banding due to fiber reinforcement.

Why is my nozzle wearing out?
CF and GF materials are abrasive.
Switch to hardened steel, ruby, or carbide.

How should I store UltraDry PETG?
Store in a sealed bag or dry box with an UltraDry™ desiccant pouch.
This maintains the DryFusion™ moisture profile and ensures consistent extrusion over time.

Do I need to use desiccants with UltraDry PETG?
While UltraDry PETG is more stable than typical PETG, using UltraDry™ desiccants helps maintain a dry, controlled environment — especially for long prints, humid climates, or multi‑spool storage.

What’s the best way to keep multiple spools stable?
Use a dry box or airtight tote with UltraDry™ 100g or 300g desiccant bottles.
For large storage bins or print farm racks, the 500g and 1kg UltraDry™ bags provide long‑term moisture control.

Can I get consistent batch‑to‑batch material for production?
Yes — the Stock & Release Program provides controlled inventory, consistent batches, and on‑demand fulfillment for engineering teams.