The eSUN S300 Standard Black Resin (1kg) is a high-precision, 405nm UV-curable photopolymer resin engineered for entry-level and professional desktop MSLA/LCD and DLP 3D printers. Formulated for ultra-low volumetric shrinkage, rapid exposure curing, and balanced mechanical toughness, this resin delivers sharp geometric edges, ultra-fine feature reproduction, and a smooth, solid black surface finish. It is an ideal general-purpose photopolymer for high-detail figurines, miniature models, rapid design validation, and functional electronic enclosures.

Specification

• Brand / Manufacturer: eSUN
• Product Name: S300 Standard Photopolymer Resin
• Color Profile: Solid Opaque Black
• Bottle Net Weight: 1.0 kg (1000g)
• UV Wavelength Compatibility: 395nm – 405nm (Optimized for 405nm monochrome/color LCD and DLP light engines)
• Viscosity (at 25°C): Approx. 150 – 250 mPa·s (Low viscosity for fast reflow and easy cleaning)
• Liquid Density: Approx. 1.05 – 1.15 g/cm³
• Volumetric Shrinkage: ≤ 5.5% – 6.5% (Low shrinkage ensures high dimensional accuracy)
• Tensile Strength: Approx. 35 – 45 MPa
• Elongation at Break: Approx. 10% – 15%
• Flexural Strength: Approx. 40 – 55 MPa
• Flexural Modulus: Approx. 1200 – 1600 MPa
• Shore Hardness: 80D – 84D
• Heat Deflection Temperature (HDT): Approx. 55°C – 60°C
• Printer Compatibility: Compatible with standard 2K, 4K, 8K, and 12K LCD/MSLA and DLP resin 3D printers (Anycubic Photon series, Elegoo Mars & Saturn series, Creality Halot series, Phrozen Sonic series, etc.).

Features

• High Precision & Sharp Feature Definition: Formulated with low-scattering black pigments and low volumetric contraction to produce crisp surface details, sharp edges, and tight dimensional tolerances without light bleed.
• Fast Curing & High Print Efficiency: Optimized photoinitiator chemistry ensures short layer exposure times (1.5s – 3.0s on monochrome screens), accelerating print turnarounds while maintaining strong interlayer bonding.
• Low Viscosity for Easy Flow & Clean Washing: Flows readily across the FEP/PFA film to ensure quick vat replenishment between layer lifts, while rinsing off effortlessly in isopropyl alcohol (IPA).
• Balanced Hardness & Impact Resistance: Cures to a rigid 80D–84D Shore hardness with enough ductility to resist brittleness during support removal and everyday handling.
• Deep, Opaque Black Pigmentation: Features dense, uniform pigment dispersion that yields a sleek, non-translucent black surface finish that hides internal infill lattice structures.
• Low Odor Formulation: Engineered with high-purity monomers to minimize harsh volatile organic vapors during the printing process, providing a more pleasant workshop environment.

Common Applications

• Detailed Tabletop Miniatures & Collectibles: Printing high-resolution character sculpts, gaming terrain, and display statues ready for painting.
• Rapid Prototyping & Visual Mockups: Fast, cost-effective validation of fit, form, and ergonomics for product concepts and mechanical components.
• Custom Electronics Housings: Fabricating smooth, professional black enclosures, sensor bezels, and mounting brackets for DIY electronics and maker projects.
• Jewelry Patterns & Artistic Models: Producing masters, negative molds, and complex organic shapes requiring microscopic layer resolution.

Professional Printing and Post-Processing Tips

• Shake Thoroughly Before Pouring: Black resins contain heavy micro-pigments that can settle over time. Shake the sealed bottle vigorously for 1 to 2 minutes before pouring into the vat to ensure uniform color and consistent curing performance.
• Baseline Slicer Exposure Settings (Monochrome LCD): Set Bottom / Base Layer Exposure to 25s–35s (5–6 layers) for reliable build-plate adhesion, and Normal Layer Exposure to 2.0s–2.8s at a 0.05mm layer height (fine-tune using an exposure calibration test print).
• Two-Stage Wash Cycle: Wash printed parts in a wash station or bath filled with 95%+ Isopropyl Alcohol (IPA) or Ethanol for 3 to 5 minutes. A quick initial rinse followed by a clean secondary bath removes trapped resin without softening delicate features.
• Post-Curing Protocol: Thoroughly dry the part with compressed air or allow it to air-dry completely before post-curing. Cure in a 405nm UV curing chamber for 2 to 5 minutes, rotating occasionally for uniform surface hardening.
• Safety & Storage: Always wear nitrile gloves and safety goggles when handling uncured resin. Store the bottle tightly capped in a cool, dry, dark environment away from direct sunlight (recommended storage temperature: 15°C to 30°C).