The first layer is everything in 3D printing. Here's the complete troubleshooting guide — from Z-offset to bed surface — that actually fixes the problem.
1. Check bed level — nozzle gap should be ~0.1mm (paper test)
2. Lower Z-offset 0.05mm at a time until filament "squishes" onto bed
3. Clean bed with 90%+ IPA — finger oils kill adhesion
4. Increase bed temp (PLA: 60°C, PETG: 80°C, ABS: 105°C)
5. Slow first layer to 15–20 mm/s
80% of first-layer adhesion problems come from incorrect nozzle height. Too high = filament doesn't stick. Too low = nozzle scrapes bed and clogs. The goal is a slight "squish" that bonds filament to surface.
Too High
Round bead, gaps, no adhesion
Perfect ✓
Flat, squished, slight spread
Too Low
Clogged nozzle, scratches bed
Paper test method:
Home Z, slide a standard sheet of paper between nozzle and bed. You should feel slight resistance but can still move the paper. Repeat all 4 corners + center.
| Material | Minimum | Recommended | Notes |
|---|---|---|---|
| PLA | 50°C | 60°C | Can print without heated bed, but worse adhesion |
| PETG | 70°C | 80°C | Often sticks TOO well — may need release agent |
| ABS | 100°C | 105–110°C | Needs enclosure too, or warping overrides adhesion |
| ASA | 95°C | 100°C | Same requirements as ABS |
| TPU | 30°C | 40–50°C | Low temp to avoid over-sticking |
| Nylon | 70°C | 80–90°C | Needs PEI or Garolite — most surfaces fail |
PEI Sheet (Textured or Smooth)
⭐⭐⭐⭐⭐✓ Good for: PLA, PETG, ABS, ASA, TPU
✗ Avoid: Nylon (needs Garolite)
Best all-around surface. PLA releases when cool. PETG: use smooth side, may need release agent.
Glass (plain or borosilicate)
⭐⭐⭐⭐✓ Good for: PLA (with adhesive), PETG
✗ Avoid: ABS (warps too fast), Nylon
Flat, consistent surface. Apply glue stick or hairspray for PLA adhesion.
Garolite / G10
⭐⭐⭐⭐✓ Good for: Nylon (excellent), PLA
✗ Avoid: PETG (sticks too hard)
Best surface for Nylon. Nylon chemically bonds to Garolite.
BuildTak / similar
⭐⭐⭐✓ Good for: PLA, ABS
✗ Avoid: PETG (ruins surface)
Wear surface. Never print PETG directly on BuildTak — it fuses.
Blue Painters Tape
⭐⭐✓ Good for: PLA (cool bed only)
✗ Avoid: PETG, ABS, anything hot
Emergency option for PLA. Refresh often — loses adhesion quickly.
| Product | Best For | Notes |
|---|---|---|
| Glue stick (Pritt/Elmer's) | PLA, ABS, PETG on glass | Water-soluble, easy removal. Reapply every few prints. |
| Hairspray (Aquanet) | ABS, PLA | Classic ABS solution. Apply thin layer, let dry. Works well on glass. |
| 3DLAC | PLA, PETG, ABS, TPU | Dedicated 3D adhesive. Better than hairspray, wash off with water. |
| Magigoo | PLA, PETG, Nylon, PP | Material-specific formulas. Stick hot, release cold. Expensive but effective. |
| ABS Slurry | ABS, ASA on glass | DIY: ABS scraps dissolved in acetone. Strong adhesion. Only for ABS/ASA. |
| Setting | Value | Why |
|---|---|---|
| First layer height | 0.2–0.3 mm | Thicker = more material, better bonding surface |
| First layer width | 120–150% | Wider lines = more contact area with bed |
| First layer speed | 15–25 mm/s | Slower = more time to bond, less vibration |
| First layer fan | 0% (off) | No cooling = material stays soft longer, bonds better |
| First layer temp | +5°C nozzle | Slightly hotter = more flowable = better adhesion |
| Brim | 5–10mm | Increases contact area, prevents corner lifting |
Z-gap target: ~0.1mm (paper test)
First layer speed: 15–25 mm/s
PLA bed: 55–65°C
PETG bed: 75–85°C
ABS bed: 100–110°C
Clean with: IPA 90%+