PLA+ vs Standard PLA: A Technical Comparison for 3D Printing

PLA Plus (PLA+) is standard polylactic acid blended with impact modifiers, plasticizers, and flow enhancers. On paper the two materials look nearly identical. In practice, the differences in print settings, mechanical performance, and handling characteristics are significant enough to warrant separate slicer profiles. This guide breaks down exactly where they diverge and how to adjust your settings when switching between them.

Material Composition and What It Changes

Standard PLA is an unmodified corn-starch-derived polymer. PLA+ blends in additives (the specific formulation varies by brand) that increase impact resistance, reduce brittleness, and improve layer-to-layer fusion. These additives require higher nozzle temperatures to properly activate, which is why PLA+ profiles run 10–15°C hotter than standard PLA.

Property	Standard PLA	PLA+
Nozzle Temperature	190–210°C	210–230°C
Bed Temperature	50–60°C	55–65°C
Cooling Fan	100% from layer 3	80–100% from layer 3
Impact Resistance	Brittle, snaps cleanly	3–10x higher (brand-dependent)
Flexibility	Very rigid	Slightly more ductile
Heat Deflection Temp	~52°C	~55–60°C
Stringing Tendency	Low	Slightly higher (more fluid melt)
Moisture Sensitivity	Moderate	Moderate (same drying protocol)

When to Choose PLA+ Over Standard PLA

Choose PLA+ when the printed part needs to survive impacts, flexing, or rough handling. Functional brackets, snap-fit enclosures, protective covers, and tool handles are all better served by PLA+ than standard PLA. Standard PLA remains the better choice for display models, figurines, and prototypes where dimensional accuracy matters more than strength, because it runs at lower temperatures with slightly tighter tolerances.

Slicer Adjustments When Switching from PLA to PLA+

Raise nozzle temperature by 10–15°C. Start at 215°C and run a temperature tower. Most PLA+ blends settle between 215–225°C.
Raise bed temperature by 5°C. PLA+ benefits from a slightly warmer first layer, especially on smooth PEI where higher-temperature melt improves wetting.
Reduce cooling fan to 80%. Drop from 100% to 80% for normal layers. Re-enable full 100% cooling on overhangs and bridges specifically.
Add 0.1–0.2mm to retraction distance. The additives in PLA+ increase melt fluidity and produce minor stringing. A small retraction increase compensates for this without risking clogs.
Slow outer perimeter speed by 10%. More contact time improves fusion of the impact modifiers at the perimeter walls, which is where impact loads are typically transferred.

Brand-Specific Temperature Notes

The "PLA+" designation is not standardized across manufacturers. eSUN PLA+ is one of the highest impact-resistance formulations available and requires the full 215–225°C range. Overture PLA+ and Inland PLA+ are softer blends that print closer to 210–215°C. Polymaker PolyMax PLA is technically a separate formulation but prints in the same window. Always run a temperature tower for each new brand.

Frequently Asked Questions

Is PLA+ dishwasher-safe?

No. PLA+'s heat deflection temperature is around 55–60°C, and dishwashers regularly exceed that during the drying cycle. PLA+ improves impact resistance but does not significantly raise heat resistance. For food contact use PETG, and coat interior surfaces with food-safe resin to seal layer gaps.

Can I use the same nozzle for PLA and PLA+?

Yes. Both materials are compatible with standard brass nozzles. PLA+ contains no abrasive additives and does not accelerate nozzle wear. Use the same cold pull cleaning procedure at 90°C before switching between materials.

Does PLA+ need to be dried before printing?

Yes, same as standard PLA: 45–50°C for 4–6 hours. PLA+ is slightly more moisture-sensitive than standard PLA because the hygroscopic additives can absorb water independently of the base polymer. If you notice surface roughness or cracking strands, dry the spool before printing.

Which PLA+ brand has the best impact resistance?

eSUN PLA+ consistently tops community testing for impact resistance. Polymaker PolyMax PLA is the other top performer. Budget brands like Inland and Overture PLA+ are an improvement over standard PLA but fall short of eSUN and Polymaker in formal Charpy and Izod impact tests.