3D Systems VisiJet RWT-RCL-R89 Multi-Material Composites (VisiJet CR-WT 200** + VisiJet CR-CL 200) is a paired rigid photopolymer configuration for MultiJet Printing. The system pairs VisiJet CR-WT 200, an opaque white resin, with VisiJet CR-CL 200, a clear resin, in separate fluid channels. Build files assign each resin to discrete regions or voxels within the same layer. The product designation covers a multi-material build set rather than a single mixed resin. The system is classified as a general-purpose rigid composite material set; it is not implicitly certified for medical, food-contact, potable-water, or long-term outdoor service. Application-specific compliance must be obtained from supplier documentation.

Deposition occurs through piezoelectric inkjet printheads with UV curing after each layer. The two resins are not pre-blended or compounded. The printer manages reservoir temperature, jetting waveform, and planarization. Process deviations at the printhead level produce visible defects at the white/clear boundary. Missing or deflected nozzles create banding, while incomplete planarization causes layer-pair smearing. Production-scale MultiJet Printing platforms require drop-test patterns and printhead purging before multi-material jobs. A filtration absolute rating of 1 µm is typical for feed lines; filter blockage produces printhead inlet pressure decay and can trigger a suspect-build alarm. Twin-screw extrusion is not applicable to this system, because material is not melt-compounded. Shear history is limited to reservoir, delivery line, and printhead manifold flow.

What distinguishes the RWT-RCL-R89 configuration from single-resin rigid photopolymers?

Unlike monolithic single-resin photopolymers, the RWT-RCL-R89 kit is a process-level multi-material solution. The build file can assign CR-WT 200 to housing and mounting features while assigning CR-CL 200 to lens or window regions. This avoids secondary adhesive bonding but introduces a phase-separated interface. The interface is not a co-polymerized molecular network; it is created by adjacent residence of the two cured resins at the voxel boundary. Its strength is governed by the degree of interpenetration during the uncured state and by UV dose at the boundary. Published data specific to interfacial fracture toughness under ASTM D5045 or similar methods is limited. Qualification for load-bearing multi-material parts requires additional testing beyond bulk tensile or flexural values. Single-resin substitutes such as VisiJet M2R-WT or VisiJet M2R-CL do not provide the same multi-material deposition capability.

Part orientation relative to the white/clear boundary changes interfacial quality. A horizontally oriented boundary is exposed to planarization shear and may smear one resin into the other. A vertically oriented boundary preserves sharper geometric definition but creates a stacked interfacial seam. Nested clear windows inside white housings often require vertical boundaries. Support contact on the clear face can leave witness marks that are difficult to remove without optical polishing. A boundary offset of at least 2 mm from support contact lines is used on some production builds; this offset is process-specific and must be verified by first-article inspection.

Mechanical, thermal, and optical constraints for multi-material builds

Typical manufacturer-reported property values for the two component resins are summarized in Table 1. Specimens are conditioned at 23 ± 2 °C and 50 ± 5 % RH for 24 h before testing. Tensile properties follow ASTM D638-14 with a crosshead speed of 5 mm/min. Flexural properties follow ASTM D790-17. Heat deflection temperature follows ASTM D648-18 at 0.46 MPa. Shore D hardness follows ASTM D2240-15. Values are lot means, not specification minima.

The clear resin shows a slightly higher tensile modulus and lower elongation than the white resin in the manufacturer’s typical dataset. These differences are modest but influence snap-fit and hole-stress design. Sharp notches in thin CR-CL 200 regions can produce brittle fracture before the bulk elongation value would suggest. Published Izod or Charpy impact data for this product are limited; therefore, impact resistance should be tested on printed specimens if dynamic loading is expected.

Service temperature is bounded by the lower heat deflection temperature of the pair. Continuous exposure above 50 °C can produce creep, particularly in thin clear regions under mechanical load. Support removal is a critical thermal step. Wax removal ovens must be thermocouple-mapped; controller setpoint alone does not guarantee uniform part temperature. A conservative removal setpoint below 45 °C reduces interfacial stress but increases removal cycle time. Ultrasonic cleaning after wax removal should use solvents recommended by 3D Systems. Ketones, chlorinated solvents, and strong bases are not recommended for cleaning because they can attack the cured resin. The white material is opaque; the clear material requires polishing or coating to achieve optical clarity. As-printed CR-CL 200 surfaces retain planarization lines and support-wax residue that reduce transmission in the visible range. Standardized transmittance data under ASTM D1003 is limited for this material; optical performance should be evaluated on printed slabs of the intended layer thickness.

When clear component regions require optical surface finish after jetting

Optical prototypes using CR-CL 200 in the RWT-RCL-R89 set require post-processing. Polishing begins with 600-grit wet abrasive, progresses through 1200-grit and 2000-grit, and finishes with a fine polishing compound. Material removal should be controlled to avoid reducing wall thickness below design tolerance. Alternatively, a clear acrylic or polyurethane topcoat can fill layer steps, but the coating must be checked for adhesion to the UV-cured surface. Rinsing with isopropanol should be brief; prolonged solvent immersion can cause microcracking. For fluid-flow visualization parts, internal channels are difficult to polish; wall transparency is therefore reduced by internal layer lines. Channel design should incorporate accessible polished surfaces or accept a translucent rather than transparent appearance.

Typical uses include consumer electronics prototype housings with clear display windows, fluid-flow test manifolds, light-guide proof-of-concept models, and tooling masters where opaque and clear regions are required. The material is not qualified for continuous outdoor exposure under ultraviolet radiation; no weatherability data under ASTM G154 or SAE J2412 is supplied for this system. It is not designed for potable-water contact under NSF/ANSI 61 or for food-contact service under FDA 21 CFR 177. For medical device prototyping, cytotoxicity testing according to ISO 10993-5 may be required and is not implied by the supplier designation. Clear regions exposed to repeated handling can scuff; hard coats may be required.

Compared with single-material VisiJet M2R rigid photopolymers, the RWT-RCL-R89 set is a multi-material deposition solution rather than a monolithic resin replacement. The two component resins are not identical in cured properties to M2R-WT or M2R-CL. Substitution based solely on Shore D or tensile modulus is not appropriate. Published quantitative comparisons between CR-WT 200 and M2R-WT or CR-CL 200 and M2R-CL are limited. Users should conduct a build-test program for dimensional accuracy, interfacial integrity, and optical performance on the intended MultiJet Printing platform. The term multi-material composite in this designation does not denote a dispersed filler or fiber-reinforced system. The composite arises from spatial arrangement of two continuous polymer phases, not from particulate reinforcement.

Storage and handling conditions govern lot-to-lot reproducibility

Cartridges are stored at 15–25 °C. Before loading, cartridges should equilibrate inside the printer bay to avoid condensation on cold surfaces. The uncured resin is a skin and eye irritant; nitrile gloves and safety eyewear are required during cartridge change and waste handling. Waste tray material should not be returned to the supply cartridge because support wax and particulate contamination alter viscosity and jetting behavior. If the printer is idle for more than the manufacturer’s specified interval, the resin in the delivery lines may require purging. Incomplete purging produces streaking at the start of a multi-material build. For moisture control, cartridge caps should be replaced immediately after disconnect. Humidity above 60 % RH in the build environment may increase water uptake in open resin trays and change curing response.

Lot-to-lot variation is managed through incoming viscosity, density, and spectral transmission checks. Resin lots that differ in viscosity by more than 5 % from the printer’s calibrated reference may alter drop mass and multi-material registration. Incoming quality control should include a wet-film cure test under the printer’s UV dose. If the cure speed shifts, the white/clear boundary may develop oxygen-inhibited surfaces or incomplete layer adhesion. The supplier certificate of analysis lists batch-specific viscosity, density, and cure response; these values should be trended on a control chart rather than used as pass/fail alone.

Cured moisture uptake is low but non-zero. Dimensional testing after water immersion for 24 h is not supplied for this product under ASTM D570; users requiring humid-environment tolerance should condition printed specimens. If the white and clear phases absorb moisture at different rates, micro-scale step displacement at the boundary can occur. Baking at 30 °C for 2 h before metrology reduces absorbed moisture variability but must remain below the lower heat deflection temperature.