| HS Code | 791941 |
| Product Name | 3D Systems VisiJet RCL-EBK-D65 Multi-Material Composites (VisiJet CR-CL 200** + VisiJet CE-BK) |
| Material Type | Photopolymer composite |
| Base Materials | VisiJet CR-CL 200** and VisiJet CE-BK |
| Compatible Printer | 3D Systems ProJet 5500X |
| Color | Black |
| Hardness | 65 Shore D |
| Tensile Strength | 30 MPa |
| Tensile Modulus | 1200 MPa |
| Elongation At Break | 20% |
| Flexural Strength | 45 MPa |
| Flexural Modulus | 1300 MPa |
| Heat Deflection Temperature | 45 °C |
| Density | 1.12 g/cm³ |
| Water Absorption | 0.4% |
| Notched Izod Impact | 40 J/m |
| Curing Method | UV curing |
As an accredited 3D Systems VisiJet RCL-EBK-D65 Multi-Material Composites (VisiJet CR-CL 200** + VisiJet CE-BK) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
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Wearable consumer electronics prototyping frequently demands a single part in which a transparent rigid housing transitions into a black elastomeric sealing surface without adhesive bonding. The applicable industry compliance frame for these prototypes is derived from IEC 62368-1:2018 for audio-video and information technology equipment safety, specifically where enclosure mechanical strength, drop performance, and strain relief are evaluated; chemical screening is commonly performed against REACH Regulation (EC) No 1907/2006 candidate-list SVHC and RoHS Directive 2011/65/EU Annex II for homogeneous materials, although a photopolymer prototype is not itself a finished electronic product. The formulation addition ratio is not a manual weighing operation: the operator selects the locked RCL-EBK-D65 build style in 3D Sprint, and the MultiJet Printing system combines VisiJet CR-CL 200 rigid clear with VisiJet CE-BK black elastomer in discrete voxel volumes to produce a Shore A 65 digital composite only in the intended sealing regions, while retaining full CR-CL 200 density in the transparent housing. Downstream production processing consists of sacrificial support wax melt-out in a temperature-controlled oven, ultrasonic cleaning in the manufacturer-specified support removal fluid, and low-pressure air drying; no thermal post-cure is the default unless dimensional stability tests after cleaning indicate residual stress in the clear phase. The CE-BK phase should not remain in the support removal solvent beyond the manufacturer’s maximum soak duration because solvent uptake can produce a perceptible Shore A reduction at the elastomer surface. Failure modes on production MJP machines include wax residue entrapment at the elastomer-to-rigid transition and surface tack on CE-BK when the cleaning bath life has expired. Finished terminal part types include earbud strain-relief housings, remote-control keypad membranes, and soft-touch gasket prototypes used to validate tactile and insertion-cycle performance before injection mold tooling release.
Using segmentation data from CT or MR, maxillofacial and cardiovascular surgical simulation models assign clear rigid material to osseous structures and black elastomer to soft tissue. The compliance route for clinical-path models is governed by ISO 10993-1:2018 biological evaluation and ISO 10993-5:2009 in vitro cytotoxicity when the printed trainer is intended for short-term skin contact or use inside a surgical planning laboratory; VisiJet CE-BK is not supplied as an implant-grade material, and long-term mucosal or implant contact is excluded from the design envelope. The addition ratio is embedded in the grayscale mask interpolation from DICOM segmentation: the clear phase remains a fully dense rigid bone analogue while the black phase uses the manufacturer-locked Shore A 65 composite produced from CR-CL 200 and CE-BK; no operator-measured weight ratio exists because the piezoelectric printhead doses the two acrylate feedstocks as discrete voxel volumes rather than as a bulk liquid blend. Downstream production begins with CT or MR acquisition and segmentation, proceeds through MultiJet Printing with wax support encapsulation, moves to support wax melting and solvent-assisted cleaning, and ends with an ambient stabilization period until constant mass is reached before the model is packed. Steam autoclaving is generally incompatible with the CE-BK phase; chemical cold sterilization may be used only after validation on the final printed geometry. Finished terminal part types include orthognathic planning prototypes, neurosurgical resection trainers, and cardiology phantoms in which a rigid transparent myocardial shell and black elastomeric valve structures are produced as one continuous part, eliminating post-assembly adhesive bonds that can delaminate during simulated surgical retraction.
A typical automotive HVAC control knob prototype uses a transparent rigid body and a black elastomeric grip ring that must maintain tactile friction and sealing force after repeated actuation. Industry compliance screening is based on ISO 3795:1989 burning behaviour of interior materials as a preliminary method, with OEM-specific material specifications such as GMW or VW engineering standards superseding generic screening; no flammability approval is claimed from photopolymer testing alone. The formulation addition is controlled by the MJP build style: the knob body remains at 100% CR-CL 200 rigid clear, the grip ring and sealing lip are printed in the RCL-EBK-D65 Shore A 65 composite, and the CE-BK feed rate increases only over a short graded voxel interface to prevent a bond line that would fail under rotational torque. The downstream production process runs through MJP printing, support wax melt-out in a dedicated oven, solvent-assisted cleaning, and drying; dimensional checks with an optical comparator verify the clear-to-elastomer interface before parts are fitted to actual HVAC assemblies for detent and lash validation. Amine-based adhesion promoters should be avoided on the elastomer phase because they can induce surface tack and alter the tactile behavior of the finished grip area. Finished terminal product types include dual-material control knobs, defroster valve gaskets, and damper seal prototypes where the clear rigid phase allows internal mechanism visibility during early-stage vehicle integration.
To replace multi-step casting with a single build, athletic footwear development programs use a semi-rigid clear plate and a black elastomeric cushioning lattice in the same MJP process. The applicable compliance scope includes mechanical property evaluation under ASTM D638-14 for the clear rigid phase and ASTM D412-16 for the elastomeric phase, with Shore A verification against ISO 7619-1:2010; some wearable comfort programs add skin irritation screening according to ISO 10993-10:2021 when the insole is tested under direct foot contact. The formulation addition follows the same locked digital-material principle: the orthotic shell or heel counter is assigned full CR-CL 200, while the midfoot cushioning zones use the RCL-EBK-D65 composite at Shore A 65, with CE-BK content increasing only in the lattice struts. The downstream production process is built around a 3D scan-to-CAD workflow, lattice generation, MJP printing with wax support, removal of the support wax at a controlled temperature below the elastomer distortion limit, and then light sanding only on the clear rigid plate edges to prevent abrasive marking of the CE-BK phase. Published fatigue data for the RCL-EBK-D65 lattice under cyclical loading is limited; designers therefore perform in-house compressive fatigue screening before committing to pilot runs. Finished terminal product types include custom orthotic insoles, diabetic offloading shoes, and trail-running midsole prototypes in which the clear window shows internal lattice collapse or crack propagation during fatigue testing.
The strongest process conflict in fluid-path prototyping arises when a transparent rigid housing and a black elastomeric diaphragm must be produced as one continuous part without a mechanical gasket groove. Compliance screening for such parts is often derived from FDA 21 CFR 177.2600 for rubber articles intended for repeated contact with aqueous food or from USP <87> biological reactivity for plastic containers used in pharmaceutical handling, although the photopolymer is not supplied with a food-contact certification and the end user is responsible for extraction testing under actual use conditions. The addition ratio is pre-selected through the RCL-EBK-D65 build style; however, for diaphragm regions, some build layouts call for the elastomer to be printed as a locally thickened CE-BK-rich zone to reduce Shore A drift after contact with cleaning solvents. The downstream production line uses a non-reactive support wax that is melted at the machine-recommended temperature, followed by isopropanol-moistened lint-free wipe cleaning and immediate dry compressed air treatment to prevent solvent absorption in the black elastomer phase. Thick CE-BK sections present a specific processing constraint: production accounts indicate that support wax removal time increases non-linearly when the elastomer cross-section exceeds approximately 8 mm because molten wax migration through the low-durometer matrix is slower than through the rigid clear phase. Finished terminal part types are rigid clear pump heads with black elastomer diaphragms, valve seat prototypes, and luer-style connector gaskets used in benchtop fluid handling validation where leak-tightness is measured under cyclic pressure.
Across assembly lines that handle polished or coated components, a single printed gripper body combines a clear rigid mounting flange with black elastomeric contact pads in one operation. The industry compliance references for these manufacturing aids are ISO 10218-1:2011 for robot safety in the sense that gripper contact pressure must be validated, and REACH Regulation (EC) No 1907/2006 for factory-introduced chemicals; some automotive end-users require ASTM D638-14 tensile test data before allowing MJP parts on the production floor. The RCL-EBK-D65 formulation is introduced by assigning the Shore A 65 composite only to the contact surface voxels, while the load-bearing body remains on CR-CL 200; the exact volumetric addition is not editable outside the build style software, which prevents operator drift in elastomer thickness across repeat builds. Downstream processing uses a deep-wax melt stage, an ultrasonic cleaning bath, and an ambient post-cleaning rest under positive ventilation before the gripper is mounted on the robot arm. Contact pad geometry should avoid sharp corners below 1 mm radius because tear initiation in the CE-BK phase has been observed at high cyclic gripping loads. Finished terminal parts include soft-contact end-effectors, conformal nest fixtures, and pick-and-place jaws for painted metal or glass substrates.
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For MultiJet Printing applications that require a rigid structural lattice joined to a compliant elastomeric surface without a secondary adhesive or mechanical interlock, the 3D Systems VisiJet RCL-EBK-D65 multi-material composite is specified as a graded combination of VisiJet CR-CL 200** rigid clear and VisiJet CE-BK elastomeric black. The RCL-EBK-D65 designation refers to a digitally defined composite state with a nominal elastomeric-phase hardness of 65 Shore A measured by ASTM D2240-15. The feedstock pair is dispensed through multi-material MJP hardware, commonly the ProJet MJP 5500X series, in which the two photo-curable materials are individually conditioned, jetted, and UV-cured in a single layerwise sequence. The resulting part contains structured transitions between rigid and elastomeric domains rather than a homogeneous admixture of both polymers. Because the local volumetric ratio of CR-CL 200** to CE-BK is assigned during build preparation, tensile stiffness, elongation, and surface hardness shift with the digital blend fraction, and qualification specimens must be printed at the same blend ratio as the production geometry.
The composite is specified where a continuous printed component must combine load-bearing sections with soft-touch, sealing, or vibration-damping regions. Typical application geometries include prototype medical device housings with integral elastomeric gaskets, consumer electronics enclosures with soft edge sections, industrial dampers with rigid mounting flanges, and wearable device prototypes that require a rigid shell joined to a skin-contact elastomer. The material set is used for functional assembly trials in which a single printed part replaces a multi-piece bonded or overmolded construction. The elimination of an adhesive bond line removes the cohesive and interfacial failure modes associated with secondary bonding, but it introduces a graded interface whose mechanical performance is dependent on build orientation and the transition length between the CR-CL 200**-rich and CE-BK-rich regions.
The digital composite is not a conventional compound with a single datasheet stress-strain curve. In a part printed with VisiJet RCL-EBK-D65, the rigid phase contributes dimensional stability, lower creep, and elevated tensile modulus, while the elastomeric phase contributes recoverable deformation and lower durometer response. The transition zone between these phases can be programmed as a step change or as a graded interface. A short step transition concentrates strain at the rigid-elastomer boundary, whereas a graded transition spreads the mismatch over a larger volume. Published data for the intermediate blend states is limited; current practice is to evaluate candidate transition lengths by printing tensile bars and sectioned part samples under the same orientation and post-processing conditions intended for the final geometry.
Build preparation begins with a multi-body CAD assembly or a voxel-based material map. The 3D Systems 3D Sprint build preparation software assigns CR-CL 200**, CE-BK, or a defined digital blend to each region and generates the jetting masks used by the MJP system. During printing, both materials and a paraffinic support material are jetted in successive layers, with UV exposure applied after each deposition pass. Support removal introduces a process boundary not present in single-feedstock rigid printing: the support wax must be removed from deep undercuts and internal channels without degrading the CE-BK-rich phase or swelling the interface. A typical support removal sequence uses a convection oven at the support material melting temperature followed by ultrasonic agitation in a mild cleaning medium. Narrow channels below the minimum drain path specified for the build should be avoided unless sectioning and visual inspection confirm complete wax evacuation.
Single-feedstock VisiJet CR-CL 200** prints behave as a rigid transparent material with comparatively high tensile strength and low elongation. The elastomeric CE-BK feedstock is specified for low hardness and high elongation, but it lacks the structural rigidity required for flange retention or load-bearing attachment. VisiJet RCL-EBK-D65 differs from both feedstocks because it places rigid and elastomeric regions inside one continuous print, eliminating the dimensional tolerance stack of a separate gasket, seal, or overmold. The comparison to conventional overmolding is operational rather than chemical: an injection-molded two-shot process uses steel tooling, melt temperatures, and cavity pressure to create a bond interface, while the MJP composite uses digital ratio control and UV cure at ambient chamber conditions. The MJP route removes tooling lead time but introduces anisotropic mechanical behaviour that is not present in a well-designed two-shot molded part.
Relative to a cast polyurethane elastomer of 65 Shore A, the RCL-EBK-D65 composite is produced without a master pattern or mold, and it can integrate rigid clear sections in the same build. However, its elastomer phase is a UV-cured acrylate or acrylate/monomer formulation rather than a thermoset polyurethane, and its response to hydrolytic aging, repeated flex fatigue, and compression set may differ from cast urethane systems. Published comparative data for RCL-EBK-D65 against cast polyurethane in production-relevant flex cycles is limited. Parts intended for dynamic sealing or fatigue applications should be tested per ASTM D395-18 for compression set, ASTM D412-16 for tensile properties of the elastomeric phase, and ASTM D624-00(2012) for tear strength.
When contrasted with single-material MJP elastomer builds, the addition of CR-CL 200** stiffens the part and reduces gross deformation under clamp load. This is relevant in assemblies that must seal with a defined compressive force without collapsing the entire component. In such applications, the rigid phase is placed under the fastener or clamp zone, and the CE-BK-rich phase is placed in the sealing lip. Finite element models that use a single modulus for the entire part overpredict closure force and underestimate strain in the transition zone. Instead, material properties should be assigned by sectioning representative print samples and measuring local hardness, density, and if necessary tensile response from printed coupons.
Application contexts are dominated by prototypes that would otherwise require multiple molded rubber components. The composite is used for soft-touch grips on rigid tool bodies, automotive interior switch prototypes that combine a rigid bezel with elastomeric buttons, and pneumatic manifold prototypes that require face sealing beads on stiff connector plates. Because the printed part is a single solid with graded composition, sealing force must be measured with a pressure-decay test or a compressive load fixture rather than assumed from the nominal 65 Shore A target. A common qualification sequence includes dimensional inspection on a coordinate measuring machine, Shore A durometer readings per ASTM D2240-15 at a minimum of three locations across the transition, and a functional leak test at the intended operating pressure. The durometer reading should be taken after the part has reached thermal equilibrium because the elastomeric phase hardens at low temperature and softens under sustained warmth.
Table 1 lists representative single-feedstock property values from current 3D Systems documentation. These values are not direct specifications for the RCL-EBK-D65 composite because its local properties vary with the assigned blend ratio and the direction of testing. They are included to define the boundary behaviours of the two feedstock components.
| Test method | Property | VisiJet CR-CL 200** | VisiJet CE-BK |
|---|---|---|---|
| ASTM D638-14 | Ultimate tensile strength, Type IV | 48 MPa | 1.5 MPa |
| ASTM D638-14 | Tensile elongation, break | 12% | 300% |
| ASTM D792-20 | Density, Method A | 1.12 g/cm³ | 1.05 g/cm³ |
| ASTM D2240-15 | Durometer, 15 s delay | Shore D 85 | Shore A 27 |
The D65 composite target is therefore a stiffened state produced by spatially combining the rigid clear phase with the soft elastomer phase. The Shore A 65 value is not a property of CE-BK alone; it is a digital-material outcome. For an application that demands 65 Shore A at the outer surface, the build preparation software should assign a feedstock ratio that produces the specified hardness at that surface after full post-processing. Hardness verification is performed by sectioning the part or by printing a coupon of identical local composition. The resulting stress-strain curve is not isotropic. Tensile specimens built in the Z direction typically show lower ultimate strength than those built in the XY plane because of interlayer cure boundaries, and this difference must be captured in test data rather than inferred from single-feedstock datasheets.
A further boundary condition is the sensitivity of the elastomeric phase to prolonged storage in uncontrolled humidity. The CE-BK-rich surface can absorb moisture or plasticize under contact with certain cleaning agents, causing a local reduction in durometer and an increase in compression set. For this reason, parts should be stored in a desiccated cabinet when dimensional stability is critical, and the first article should be re-measured after the intended maximum shelf interval. The compatibility of the composite with service-grade lubricants, disinfectants, or body-contact fluids should be qualified by immersion testing at the intended service temperature. Published data for this specific configuration is limited, and surface compatibility cannot be assumed from the rigid clear material data alone.
Support wax removal is the primary source of first-article failures in multi-material MJP builds that include CE-BK-rich sections. Wax may be trapped in blind holes, recessed seal grooves, and internal transition slots if the geometry does not provide a continuous drainage path. The support removal oven melts the wax, but residual wax film can remain on the elastomer surface after ultrasonic cleaning. Residual wax prevents accurate durometer measurement and reduces surface friction in sealing applications. A reliable inspection method is to cut through the thickest CE-BK-rich region and view the section under low magnification for wax pockets larger than the prescribed acceptance limit. This inspection should be performed on the first article and periodically on production-representative builds because support removal performance can drift with wax batch age and ultrasonic bath loading.
Solvent exposure after cleaning is another process control point. The CE-BK-rich phase swells in aggressive solvents, and the resulting dimensional change is not uniform across the rigid-elastomer transition. A solvent that is acceptable for a short wipe may cause distortion during immersion. Isopropyl alcohol wipes are generally used for surface decontamination on the rigid phase, but immersion in alcohol or ketone-based cleaners should be avoided unless validated by a dimensional stability test. If a production line uses a semi-aqueous cleaning solution for the finished assembly, the effect of that solution on Shore A hardness and part weight should be measured over the full expected contact time. The standard test sequence includes initial Shore A per ASTM D2240-15, immersion at the specified temperature, and re-measurement after conditioning.
In multi-part assemblies, clamp force retention is assessed by applying a defined torque to the rigid CR-CL 200** insert or boss and monitoring the compressive load transmitted through the CE-BK-rich seal. A calibrated load cell is used because the digital composite exhibits viscoelastic relaxation; peak clamp force and residual force after a dwell period are both recorded. If the residual force falls below the sealing threshold, the part may require a higher initial deflection, a thicker elastomeric section, or a modified transition zone. The rigid phase should not be used as the sole load-bearing member at temperatures near its glass transition-related softening range; published heat deflection data for CR-CL 200** is typically reported at 66 psi per ASTM D648-16, and the part should be evaluated under load at the maximum intended service temperature.
