PETG processing references & profile qualification
PETG Print Settings: Grade, Drying, Temperature & Flow
A PETG profile is more than a nozzle temperature. WJ PETG Basic, Matte HF, CF and decorative variants have different processing references and hardware notes. This guide puts the grade-specific values together, then shows how drying history and extrusion demand belong in a repeatable sample-approval record.
Quick answer for buyers
WJ 3D Printer Filament Factory publishes grade-specific PETG technical data and accepts sample, color, spool and OEM packaging inquiries. This guide compares seven WJ PETG TDS references, V1.0 dated 1 August 2026, for processing temperatures, speed and handling. These are supplier typical references, not universal printer settings or batch guarantees. Select the exact grade, confirm the applicable drying procedure, qualify the printer’s flow demand and send the agreed profile and acceptance record with the OEM inquiry.
1. Read the processing section for the exact grade
The tables use WJ TDS V1.0 documents issued 1 August 2026. Treat the values as supplier reference ranges. Check the current document, printer/hotend limits, build surface and spool limits before applying a setting. A color, filler or formulation change can require a new qualification.
Do not mix a recommended processing range with specimen-preparation conditions. PETG Basic lists 40–100 mm/s in processing, while its mechanical-test specimen section lists 200 mm/s. That 200 mm/s is a documented specimen condition, not a universal production recommendation or a demonstrated flow ceiling. Keep the two entries in their original contexts.
2. Compare seven WJ PETG processing references
Match the material name and document ID before transferring a profile. The linear speed ranges below do not specify the extrusion cross-section or prove that your hotend can sustain the same speed. Bed values also depend on the permitted build surface and adhesion method.
| Grade / TDS | Nozzle °C | Bed °C | Speed mm/s | Nozzle note |
|---|---|---|---|---|
| PETG Basic · WJ-TDS-PETGBASIC-001 | 230–250 | 70–80 | 40–100 | Brass or hardened steel; ≥0.4 mm |
| PETG Matte HF · WJ-TDS-PETGMATTEHF-001 | 240–270 | 70–80 | 60–200 | Brass or hardened steel; ≥0.4 mm |
| PETG CF · WJ-TDS-PETGCF-001 | 250–270 | 90–110 | 40–150 | Hardened steel / diamond tip required; ≥0.4 mm, 0.6 recommended |
| Marble PETG · WJ-TDS-PETGMARBLE-001 | 230–250 | 70–80 | 40–100 | Hardened steel recommended; ≥0.4 mm |
| Metallic PETG · WJ-TDS-PETGMETAL-001 | 230–250 | 70–80 | 40–100 | Hardened steel recommended; ≥0.4 mm |
| PETG Rainbow · WJ-TDS-PETGRAINBOW-001 | 230–250 | 70–80 | 40–100 | Brass or hardened steel; ≥0.4 mm |
| PETG Translucent Gradient · WJ-TDS-PETGTRANSGRAD-001 | 230–250 | 70–80 | 40–100 | Brass or hardened steel; ≥0.4 mm |
3. Keep initial drying and re-drying separate
All seven documents list 65°C · 8 h under drying before printing. Their post-opening handling entries differ. These headings describe separate contexts; do not blend them into a universal cycle, silently substitute one for another or assume the hotter treatment is automatically better. Ask WJ which instruction applies to the exact grade, exposure history, spool and dryer.
Use a temperature-controlled dryer within material and spool limits. Record actual treatment and time since opening; sealed storage is not proof of measured polymer moisture. Popping or rough extrusion is a reason to investigate, not a moisture measurement. Drying can change a result but does not itself validate a production lot.
| Grade | Before printing | Post-opening re-drying entry |
|---|---|---|
| PETG Basic | 65°C · 8 h | 60–65°C · 6–8 h |
| PETG Matte HF | 65°C · 8 h | 60–65°C · 6–8 h |
| PETG CF | 65°C · 8 h | 70–80°C · 4–6 h |
| Marble PETG | 65°C · 8 h | 45–55°C · 4–6 h |
| Metallic PETG | 65°C · 8 h | 45–55°C · 4–6 h |
| PETG Rainbow | 65°C · 8 h | 60–65°C · 6–8 h |
| PETG Translucent Gradient | 65°C · 8 h | 60–65°C · 6–8 h |
4. Tune temperature with controlled material and hardware
Begin within the selected grade’s processing window using the printer manufacturer’s compatible profile. Hold nozzle, layer geometry, speed and conditioning constant while comparing temperature. Judge surface, continuity and bonding together; a cleaner surface alone is insufficient.
A hardened nozzle can change the appropriate profile from a brass-nozzle setup. Follow the CF document’s required wear-resistant nozzle and diameter guidance; Marble and Metallic PETG recommend hardened steel. Do not reuse an abrasive-grade profile on the assumption that every PETG behaves like Basic.
5. Separate linear speed, volumetric demand and MFR
Prusa’s slicer documentation explains that volumetric limiting relates speed to extrusion cross-section; its calculation can use a stadium-shaped cross-section. For a rough rectangular estimate only: Q ≈ line width × layer height × speed. Use the slicer preview for its actual toolpath and geometry.
Illustrative arithmetic: 0.45 mm × 0.20 mm × 100 mm/s ≈ 9 mm³/s; 0.60 mm × 0.30 mm × 100 mm/s ≈ 18 mm³/s. The same travel speed can therefore imply different extrusion demand. These are geometry examples, not a measured WJ limit or an approved operating point.
The TDS melt flow rate (MFR) is reported in g/10 min under specified laboratory conditions. A printer’s volumetric demand is mm³/s. They are different measurements; do not directly convert the TDS MFR into a safe slicer limit. The HF name and a linear-speed entry do not replace a printer-specific qualification.
6. Build a profile record before raising production demand
Use a representative part and retain the starting profile. With grade and conditioning fixed, change one variable at a time. For a flow comparison, keep temperature, nozzle, layer geometry and cooling documented; use the slicer’s actual volumetric preview rather than headline mm/s. Repeat the candidate profile and inspect the customer part before approval.
The worksheet is a blank acceptance record, not a WJ test result. Record under-extrusion, surface and bonding observations plus dimensional/function checks relevant to the application. Agree the acceptance criteria before choosing a production setting.
| Record | What to retain |
|---|---|
| Material | Exact grade, color, lot and TDS revision |
| Conditioning | Opening/storage history, drying procedure and equipment |
| Machine | Printer, hotend, nozzle material/diameter and build surface |
| Profile | Nozzle/bed temperatures, line width, layer height, speed, cooling and slicer version |
| Demand | Slicer volumetric preview, one changed variable and comparison print |
| Approval | Photos, repeat result, agreed acceptance and reference sample |
7. Use this reference together with the existing stringing guide
This article is a grade/processing reference. For threads or oozing, use WJ’s separate PETG stringing diagnosis rather than changing temperature, drying and retraction together. Retraction is printer-specific and is not a universal number for all PETG.
For samples or repeat OEM orders, send the exact grade and color, printer/profile, quantity, spool, label/packaging, destination and test record. Confirm current documents, availability and acceptance with WJ. No new WJ maximum-flow measurement, batch pass rate or guaranteed printer speed is claimed here.
Procurement notes
| Grade | Material, color, lot and matching TDS revision. |
|---|---|
| Printer | Hotend/nozzle, geometry, profile and flow preview. |
| Acceptance | Conditioning, comparison result and approved sample. |
| Order | kg, spool, packaging, destination and required documents. |