Resin vs PLA Figures for Collectibles — 2026 Technical Comparison

Quick Reference

Cast polyurethane resin: density 1.05–1.20 g/cm³, Shore D 75–85, heat deflection 70–95 °C, captures sub-50 µm detail, typical 18cm figure 180–260 g, retail $60–$140. FDM PLA: density 1.24 g/cm³, Shore D 83–88, glass transition (Tg) 55–65 °C, layer-line detail 80–200 µm depending on nozzle, typical 18cm figure 90–160 g (infill-dependent), retail $25–$60. Resin wins raw detail and weight feel; PLA wins price, repeatability, and impact resilience.

Physical Properties

Resin's 1.05–1.20 g/cm³ density combined with a solid pour gives an 18cm piece roughly 1.5–2× the heft of an equivalent PLA print at 15–20% infill. Resin tensile strength sits around 50–65 MPa with elongation at break of 5–8% — stiff but brittle; a 1.5m drop onto tile typically chips a thin protrusion. PLA tensile strength is 50–60 MPa with elongation 3–6%, but its layered structure absorbs impact better along the build plane and worse across it. The decisive number is heat: PLA's Tg is 55–65 °C, meaning a sealed car interior in summer (cabin temps reach 70–80 °C) will deform PLA within hours. Resin's HDT of 70–95 °C tolerates the same exposure with no visible change.

Visual & Tactile Differences

Resin reproduces sculptor intent at ~50 µm with no directional artifact, so micro-textures (fabric weave, skin pores, hair strands) read clearly under macro photography. PLA shows visible layer lines at 0.16mm layer height — readable on any flat surface in raking light, hidden after primer + sand + paint. Hand-finished PLA at 0.08mm or smaller, sanded through 600–1500 grit, closes most of that gap for the unaided eye at 30cm viewing distance. Tactile: resin feels cool and dense, PLA feels warmer and lighter. For 4K product photography, resin needs less retouching; for ring-light social posts at 1080p, the difference is rarely visible. As a case study, the Voxelyo 18cm hand-finished PLA figure at $39.90 demonstrates that wet-sanded PLA at consumer-grade prices can deliver a finish indistinguishable from entry-level resin in normal display lighting.

Care & Longevity

UV is the silent killer for both. Unmodified PLA yellows visibly in 18–36 months under indirect daylight; UV-stabilized PLA grades extend that to 4–6 years. Cast resin yellows too — pure polyurethane shifts yellow within 2–4 years unless the formulation includes HALS stabilizers, then 8–12 years. Neither material belongs in direct sun. Cleaning: both tolerate a microfiber cloth and isopropyl alcohol at ≤70%; avoid acetone (dissolves PLA, attacks some resin topcoats). Humidity above 70% RH accelerates PLA hydrolysis over 5+ years, causing micro-brittleness. For a sealed display cabinet at 18–24 °C and 40–55% RH, expect resin to look new at year 10 and a UV-stabilized painted PLA piece to look ~90% original at year 5.

Cost & Manufacturing

Resin economics favor batch production. A silicone master mold runs $80–$300 and produces 30–80 casts before degradation; per-unit material cost is $3–$8 for an 18cm pour. The labor-heavy step is demolding + venting fix + paint, totaling 25–60 minutes per piece. This is why low-run resin figures cluster at $80–$150 retail. PLA flips the model: zero tooling, ~$1.20 in filament for an 18cm piece, but 6–14 hours of print time per unit and 15–40 minutes of finishing for show-quality results. PLA scales well at runs of 1–500 (each piece costs the same); resin scales well at 50–2000 (amortized mold cost). Above 5000 units, injection-molded ABS or PVC undercuts both.

Buyer Recommendation

Pick resin if: you want maximum macro-detail fidelity, you display in a controlled cabinet, your budget tolerates $80+, and you value the dense in-hand feel of a museum-style piece. Pick PLA if: you want a sub-$50 entry into character collecting, you rotate displays seasonally, you accept that a hand-finished piece needs occasional dust-off and isn't a 20-year heirloom, or you value supporting small-batch makers who couldn't justify mold tooling. Honest call: for hyper-detailed 1/6-scale anime figures and limited-edition statues, resin is the correct material and PLA is a compromise. For 15–20cm character pieces in the $30–$60 band, hand-finished PLA delivers 85% of the visual result at 40% of the price, and that ratio wins.

Frequently Asked Questions