The eSUN S300 Standard Dark Grey 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, neutral dark grey surface finish. Its matte grey tone provides optimal visual contrast, making it an ideal choice for high-detail figurines, tabletop miniatures, rapid prototyping, and display models.

Specification

• Brand / Manufacturer: eSUN
• Product Name: S300 Standard Photopolymer Resin
• Color Profile: Solid Dark Grey (Neutral Industrial Grey)
• 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 volumetric contraction and controlled light dispersion to capture microscopic skin textures, sharp model contours, and crisp geometric edges without light bleed.
• Contrast-Enhancing Dark Grey Tone: The neutral dark grey finish clearly highlights fine contours, muscle lines, and delicate surface features under workshop lighting, making it an exceptional baseline for inspection and model painting.
• Fast Curing & High Efficiency: Optimized photoinitiator chemistry ensures short layer exposure times (1.5s – 2.8s on monochrome LCD screens), speeding up print cycles while maintaining strong layer-to-layer cohesion.
• Low Viscosity for Easy Flow & Fast Cleaning: Excellent liquid fluidity ensures quick vat refilling between layer lifts and allows leftover resin to rinse off effortlessly in isopropyl alcohol (IPA).
• Balanced Hardness & Toughness: Cures to a solid 80D–84D Shore hardness with sufficient resilience to prevent chipping and brittle fractures during manual support clipping.
• Low Odor Formulation: Refined with high-purity monomers that minimize volatile organic emissions, ensuring a cleaner, low-odor workspace environment during printing and post-processing.

Common Applications

• High-Detail Tabletop Miniatures & Busts: Printing intricate gaming figurines, character models, and fantasy collectibles ready for direct display or primer-free painting.
• Rapid Prototyping & Engineering Mockups: Producing accurate visual concept parts, ergonomic mockups, and snap-fit test components with tight dimensional tolerances.
• Architectural & Industrial Scale Models: Fabricating detailed structural components, scale building sections, and dioramas requiring neutral, professional surface tones.
• Artistic Sculptures & Master Patterns: Creating high-fidelity master patterns and negative silicone molds for resin casting.

Professional Printing and Post-Processing Tips

• Shake Thoroughly Before Use: Micro-pigments in dark grey resin can settle during storage. Vigorously shake the bottle for 1 to 2 minutes before pouring into the resin vat to ensure uniform color density and curing consistency.
• Baseline Slicer Exposure Settings (Monochrome LCD): Set Bottom / Base Layer Exposure to 25s–35s (5–6 layers) for secure plate adhesion, and Normal Layer Exposure to 1.8s–2.5s at a 0.05mm layer height (fine-tune using a validation matrix or calibration cone test).
• Two-Stage Cleaning Cycle: Wash the printed model in 95%+ Isopropyl Alcohol (IPA) or high-grade Ethanol for 3 to 5 minutes using a two-stage wash (dirty rinse followed by a clean finishing bath) to prevent white powdery residue.
• Post-Curing Protocol: Allow parts to dry completely or blow-dry with compressed air before UV curing. Cure in a 405nm UV wash-and-cure station for 2 to 5 minutes to achieve full surface hardness and tensile strength.
• Safety & Storage: Always wear nitrile gloves and eye protection when handling uncured photopolymers. Store tightly sealed in a cool, dry, dark environment away from UV light sources (recommended storage temperature: 15°C to 30°C).