R5-385 material is an update on the original R5 material, one of EnvisionTEC’s earliest materials still in use around the world, re-engineered for optimal performance in 3D printers utilizing 385nm wavelength light sources.

R5-385 produces robust, accurate and functional parts with superior chemical and water resistance, a wide processing latitude, and excellent tolerance to a broad range of temperature and humidity fluctuations.  Parts build in R5-385 exhibit superior fatigue properties and excellent surface detail as well as impressive stability over long periods of time.

Physical Properties

Tensile Strength

54 MPa (ASTM Method D638)

Elongation at Break

5 % (ASTM Method D638)

Tensile Modulus

2250 MPa (ASTM Method D638)

Flexural Strength

90 MPa (ASTM Method D790)

Flexural Modulus

2500 MPa (ASTM Method D790)


35 J/cm (ASTM Method D256)

Hardness (Shore D)

85 Shore (ASTM Method D2240)

HDT @ 1.82 MPa

54°C (ASTM Method D648)


395 cP @ 30°C

Recommended Machines

Related Materials:

Accurate and functional resin for producing robust and durable parts. Pro Gray 3D Printer Material is a liquid, photo-reactive acrylate with a wide processing latitude, which is used to produce parts with high quality up-facing and down-facing surfaces.


R5 3D printing material is a liquid photopolymer that produces robust, accurate, and functional parts. Exhibits superior fatigue properties, strong memory retention, and high quality up-facing and down-facing surfaces. Offering a good balance of properties between rigidity and functionality. Parts that mimic polypropylene. Ideal for master patterns in rubber molding applications.