DLP – Rigid 10K Resin

Rigid 10K 3D printing material on our Formlabs Form 4 and Form 4L delivers exceptional stiffness, high heat resistance, and a smooth matte surface finish—ideal for precise tooling and high‑load prototypes. It simulates the stiffness of glass- and fiber‑filled thermoplastics while producing sharp details and dimensionally stable parts.

Choose Rigid 10K 3D printing material when you need parts that won’t bend under load or heat. Note that it has low elongation (brittleness vs. tough resins), so it’s not suited for snap fits, thin living hinges, or high‑impact use.

Key Material Facts:

• Extremely stiff, glass‑filled formulation with a smooth, matte finish; simulates the stiffness of glass‑ and fiber‑filled thermoplastics and maintains dimensional stability under load.
• High thermal and chemical resistance; ideal for short‑run tooling and components exposed to heat and fluids. HDT @ 0.45 MPa up to ~238 °C with enhanced post‑cure.
• Tooling examples for pilot/low‑volume runs:
  • Injection mold inserts,
  • Blow‑mold inserts,
  • Vacuum‑form and thermoforming tools
• Typical mechanicals (post‑cured; standard at F3DP):
  • Ultimate Tensile Strength: ~88 MPa
  • Tensile Modulus: ~11 GPa
  • Elongation at Break: ~1.7%
  • Flexural Modulus: ~9.9 GPa
  • Heat Deflection Temp @ 0.45 MPa: ~238 °C (with enhanced post‑cure option)
• Color: Ivory
• Surface quality: prints with a smooth, matte, polished appearance that minimizes finishing time on tooling faces.
• Design guidance: prefer metal inserts or post‑tapped holes for fasteners; avoid thin snap features or impact‑prone geometries; add generous fillets to reduce stress concentrations.
• Limitations: brittle compared to Tough/ABS‑like resins; not suitable for living hinges, high‑impact use, or very thin, cantilevered features.

Common Applications:

• Short‑run injection mold masters and inserts; low‑volume tooling
• Thermoforming and stretch‑blow‑molding tools for pilot runs
• Heat‑ and fluid‑exposed jigs, fixtures, drill guides
• Aerodynamic/wind‑tunnel models and precision test articles
• Fluid manifolds and housings (non‑pressurized, verify chemical compatibility)
• Welding/assembly fixtures for TIG/MIG processes
• High‑stiffness alignment blocks, gauge components, metrology masters
• Robotic grippers and end‑effectors where rigidity > impact

Material Reference Data:

• For more information on how the DLP printing process works please check out this page.
• Material manufacturers website

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DLP – Rigid 10K 3D Printing Material: Technical specifications

Mechanical Properties — Rigid 10K Resin (UV postcure, typical values): Metric

Property	Unit	Post‑Cured for 60 min @ 70 °C	Post‑Cured for 60 min @ 70 °C and 125 min @ 90 °C	Post‑Cured for 60 min @ 70 °C and Media Blasted	Method
Ultimate Tensile Strength	MPa	65	53	88	ASTM D638‑14
Tensile Modulus	GPa	10	10	11	ASTM D638‑14
Elongation at Break	%	1	1	1.7	ASTM D638‑14
Flexural Strength	MPa	126	103	158	ASTM D790‑15
Flexural Modulus	GPa	9	10	9.9	ASTM D790‑15
Notched Izod	J/m	16	18	20	ASTM D256‑10
Unnotched Izod	J/m	47	41	130	ASTM D4812‑11
Heat Deflection Temp @ 0.45 MPa	°C	163	218	238	ASTM D648‑16
Heat Deflection Temp @ 1.8 MPa	°C	82	110	92	ASTM D648‑16
Thermal Expansion (0–150 °C)	µm/m/°C	47	46	41	ASTM E831‑13

Mechanical Properties — Rigid 10K Resin (UV postcure, typical values): Imperial

Property	Unit	Post‑Cured for 60 min @ 70 °C	Post‑Cured for 60 min @ 70 °C and 125 min @ 90 °C	Post‑Cured for 60 min @ 70 °C and Media Blasted	Method
Ultimate Tensile Strength	psi	9,460	7,710	12,700	ASTM D638‑14
Tensile Modulus	ksi	1,480	1,460	1,600	ASTM D638‑14
Elongation at Break	%	1	1	1.70	ASTM D638‑14
Flexural Strength	psi	18,200	15,000	22,900	ASTM D790‑15
Flexural Modulus	ksi	1,360	1,500	1,440	ASTM D790‑15
Notched Izod	ft‑lb/in	0.3	0.34	0.37	ASTM D256‑10
Unnotched Izod	ft‑lb/in	0.9	0.7	2.5	ASTM D4812‑11
Heat Deflection Temp @ 0.45 MPa	°F	325	424	460	ASTM D648‑16
Heat Deflection Temp @ 1.8 MPa	°F	180	230	198	ASTM D648‑16
Thermal Expansion (0–150 °C)	µin/in/°F	26	26	23	ASTM E831‑13

DOWNLOAD THE FULL MATERIAL DATA SHEET

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DLP – Rigid 10K Material: Part Gallery