The Carbon Printers DPR 10 Digital Production Resin is a rigid photopolymer formulated for Carbon Digital Light Synthesis systems, specifically the M2, M3, M3 Max, and L1 production printers. The material is supplied as a two-part liquid resin with a specified viscosity of 1,100 mPa·s at 25 °C and is processed at nominal layer thicknesses of 25 μm, 50 μm, and 100 μm. Cured tensile response under ASTM D638-14 Type IV geometry indicates an ultimate tensile strength of 48 MPa, elongation at break of 4.2 %, and tensile modulus of 2.1 GPa. The grade is intended for jigs, fixtures, housings, connectors, and short-run production parts where manufacturing throughput competes with machined acetal, ABS, or glass-filled nylon. Because the DLS process maintains a liquid dead zone through an oxygen-permeable optical window, DPR 10 supports continuous printing without the interlayer recoating delay present in conventional vat photopolymerization. Published data for this specific configuration is limited for out-of-plane thermal aging beyond 1,000 h.

DPR 10 Mechanical Baseline, Cure Schedule, and Thermal Envelope

The cured material is characterized by a Shore D hardness of 84 under ASTM D2240-15, a flexural strength of 82 MPa under ASTM D790-17, and a flexural modulus of 2.3 GPa. Notched Izod impact resistance is 24 J/m when tested according to ASTM D256-10. Heat deflection temperature at 0.455 MPa is 72 °C under ASTM D648-18, while deflection at 1.82 MPa is 58 °C. These properties reflect post-cured specimens processed through a forced-convection oven at 80 °C for 240 minutes. Green parts that bypass thermal post-cure retain only 70 % of the reported tensile modulus and exhibit higher creep under continuous load. Density is 1.16 g/cm³ by ISO 1183-1:2019. The resin is not recommended for continuous service above 60 °C in mechanically loaded applications, and exposure to strong polar solvents such as methyl ethyl ketone can produce swelling above 8 % by mass within 24 h. RoHS compliance is supported by supplier declarations under 2011/65/EU, though lot-specific safety data sheets should be consulted for REACH candidate-list substances.

Process control data from production M3 cells indicate that DPR 10 reaches a steady-state recoat time of 1.8 s per layer at 50 μm when resin temperature is maintained at 28 °C and vat fill exceeds 500 mL. If the oxygen-permeable window becomes fouled or shows visible haze, build-platform adhesion can fall below 0.8 MPa, and edge lift appears on parts larger than 150 mm in the X-Y plane. The resin is supplied in 1.5 kg cartridges with lot-level RFID tracking. At ambient RH above 60 %, unsealed resin baths show viscosity drift of 12 % within 72 h; pre-conditioning the build cell to below 45 % RH restores batch-to-batch Shore D variation to approximately ±2 points.

How Does the DPR 10 Resin Perform Against RPU 70 and CE 221 in Production Builds?

When evaluated side by side, DPR 10 occupies a middle position between the ductile RPU 70 polyurethane and the high-temperature CE 221 cyanate ester system. DPR 10 provides higher tensile strength and modulus than RPU 70 but sacrifices elongation, making it less suitable for snap-fit features that require repeated flexure. Compared with CE 221, DPR 10 offers substantially faster post-cure handling and lower process temperature requirements, but its thermal envelope is narrower. In production builds, DPR 10 is therefore selected where stiffness, dimensional stability, and surface quality are more important than high elongation or continuous exposure above 70 °C.

Production-scale application data from M3 Max systems running DPR 10 show that 1,200 housing components can be printed in a 36-hour continuous build using 50 μm layers and a 4.0 mW/cm² exposure dose. The parts exhibit Z-direction tensile strength retention of 86 % relative to the X-Y plane under ASTM D638-14. Retention falls to 72 % if recoat temperature is below 26 °C, which indicates that thermal management of the vat is a controlling process variable. For jigs and fixtures, DPR 10 components with 3.0 mm wall thickness withstand repeated clamp loads of 80 N over 5,000 cycles without visible surface cracking. Published data for this specific configuration is limited for dynamic fatigue above 10,000 cycles, so rotating-fixture applications require lot-specific validation.

When Shore D Hardness and Low Ash Content Matter in Vacuum-Assist Tooling

Vacuum-assist tooling and drilling fixtures place simultaneous demands on stiffness, dimensional stability, and resistance to shop-floor contamination. DPR 10 is processed into fixture bodies with 2.0 mm to 4.0 mm nominal wall thickness, using 0.4 mm support tips and 1.0 mm support spacing where overhangs exceed 2.0 mm at 45°. After isopropanol washing at 22 °C for 15 minutes, support removal force is reduced without measurable change in Izod impact. Tooling used on vacuum tables shows less than 0.2 % dimensional drift over 72 h at 23 °C and 50 % RH. The material is not recommended for direct contact with hot melt adhesives above 90 °C, because localized softening can compromise locating-hole roundness. In applications where low ash content is required, the cured resin leaves no measurable inorganic residue in a 600 °C burn-off test, although published data for this specific configuration is limited and lot-specific verification is advised.