Quick Start Guide for New Users
For users new to LCD resin 3D printing, establishing a safe and standardized workflow is essential for both print success and personal safety.
This guide walks through the complete process:
Safety Preparation → Resin Handling → Printing Setup → Post-Processing → Storage
Important Safety Notice
Uncured photopolymer resin can be irritating to skin and eyes. Always wear nitrile gloves, protective eyewear, and operate the printer in a well-ventilated area.
(1)Safety Preparation & Printer Inspection
Personal Protective Equipment:
Before handling resin, make sure the appropriate personal protective equipment is prepared. Users should wear nitrile gloves (latex gloves are not recommended) and safety goggles during operation. If available, a respirator equipped with an activated carbon filter and a protective apron can also be used for additional protection. In addition, the workspace should be well ventilated and kept away from direct sunlight to ensure safe operation.
Before the first print, perform the following checks:
●Use the provided calibration card or paper to ensure the build plate is level with the LCD screen
●Run the screen test to check for dead pixels or display issues
●Inspect the release film (FEP / ACF) at the bottom of the resin vat for scratches or deformation
●Move the build platform up and down to confirm smooth and stable motion
(2)Resin Opening & Pouring
Before opening the resin bottle, first confirm that the seal is intact and shake the bottle for 2–3 minutes to fully mix the pigments and resin components. Then slowly open the bottle in a well-ventilated area to release any internal pressure. After opening, check whether the resin color is uniform and ensure there is no layer separation or visible sediment.
Resin Pouring Procedure：
1.Place the resin vat on a stable surface
2.Slowly pour resin along the inner wall of the vat to reduce bubbles
3.Keep the resin level below the maximum mark
4.If bubbles appear, allow the resin to rest for 10–15 minutes
5.Carefully place the resin vat back into the printer
Important: Different brands or types of resin must not be mixed. Always clean the vat thoroughly before switching materials.
（3）Model Preparation & Printing
For the first print, beginners should start with models that have a large base contact area, simple geometry, and minimal overhangs or fine details. Avoid complex models until you become more familiar with the printing process and basic printer settings.Set exposure parameters in the slicing software based on manufacturer recommendations. After gaining experience, users may experiment with custom exposure settings.
Transfer the sliced file to the printer via network or USB drive, and ensure the printer is located in a well-ventilated space, such as a balcony or open room.
Print Start Checklist:
●Confirm the build plate is properly locked
●Verify the resin vat is correctly installed
●Observe the first 5 layers to ensure proper adhesion to the build plate
●Avoid moving or shaking the printer during printing
（4）Post-Processing Workflow
Cleaning
Wearing gloves, remove the model from the build plate using a scraper, then submerge it in 95% isopropyl alcohol (IPA), ethanol, or a dedicated resin cleaner. Use a soft brush to gently clean the surface and fine details, and perform a second rinse in clean solvent to remove any remaining resin. After cleaning, allow the model to air dry in a well-ventilated area. For hollow models, make sure any trapped alcohol inside the cavities is completely drained.
Support Removal
Supports should be removed after cleaning but before final curing, when the material still has some flexibility. Use flush cutters or support removal tools to cut supports at the base, rather than pulling them off to avoid damaging the surface of the print.
Secondary Curing
Place the cleaned and dried model into a UV curing box and cure it for about 10–20 minutes, depending on the model size. During curing, rotate the model to ensure all surfaces receive even UV exposure. After curing, allow the model to rest for about 24 hours so internal stresses can stabilize and the material can achieve optimal mechanical performance.
（5）Printer Cleaning
If resin remains on the build plate:
Keep the resin vat installed in the printer to prevent resin from dripping onto the LCD screen during handling.
Cleaning procedure:
1.Submerge the build plate in IPA or resin cleaner
2.Use a soft brush to remove residual resin
3.Allow the plate to air dry in a ventilated area
If you plan to continue printing and the resin in the vat is free of debris, additional resin can be added directly. If you need to switch materials or stop printing, filter the remaining resin through a resin filter and pour it back into the original bottle. To clean the resin vat, gently wipe the vat and the release film with paper towels moistened with alcohol to dissolve any remaining resin, then finish by wiping the surface dry with a clean paper towel.
（6）Resin Storage & Management
After use, tighten the bottle cap immediately and store the resin in a cool, dark place at a recommended temperature of 15–25 °C, avoiding direct sunlight and high temperatures. It is also recommended to label the bottle with the opening date and use the resin within six months to maintain optimal printing performance.
Long-Term Storage：
If the printer will not be used for an extended period, filter any remaining resin and return it to the original bottle, then thoroughly clean the resin vat and build plate. Turn off the printer, cover the LCD screen with a protective film, and clean all tools that have come into contact with resin using alcohol before storing them in a sealed container for future use.
Important Notes
●Always wear nitrile gloves, and keep spare gloves available
●Ensure good ventilation or use an air purifier
●Clean thoroughly before switching resin types
●Secondary curing is essential for optimal mechanical properties
●Avoid UV exposure during printing and keep the printer enclosure closed
Advanced Printing Guide
Once you have mastered the basics of LCD resin 3D printing, achieving higher strength, finer detail, and a broader range of applications requires a deeper understanding of materials, printer capabilities, and advanced techniques. This advanced printing guide provides a structured path to further improve your printing results, focusing on four key areas:
●Material Selection
●Printer Performance Optimization
●Material Properties and Performance
●Application Expansion
Follow this guide step by step to deepen your knowledge and systematically refine your resin printing workflow.
(1)Material Selection
The choice of resin material directly determines the final properties and potential applications of a printed part. Moving from simply “printable” to “application-ready” requires going beyond standard resins and selecting materials based on specific functional, aesthetic, or professional requirements.
Below are several common high-performance resin categories and their typical application guidelines.
Standard Resin
Standard resin is a balanced photopolymer designed to provide a good compromise between mechanical strength, print accuracy, and cost. It is the most commonly used material for general-purpose printing.
Key Features
① Balanced performance: Provides a practical balance between strength, detail accuracy, toughness, and price.
② Beginner-friendly: Less sensitive to exposure settings and environmental temperature, resulting in a higher print success rate.
③ Easy post-processing: Supports are easy to remove, and parts can be sanded or painted with minimal difficulty.
Limitations
① Moderate performance: Lacks specialized properties such as high strength, high heat resistance, or extreme toughness.
② Aging over time: Long-term exposure to light or environmental factors may cause brittleness or yellowing.
③ Limited micro-detail capability: For extremely fine textures or microstructures, specialized high-detail resins generally perform better.
Typical Applications:
Concept validation, appearance prototypes, educational models, and non-critical display parts.
Toughness Resin
Toughness resin is designed to provide high flexibility and impact resistance. Printed parts can withstand repeated bending or deformation without breaking.
Key Features
① High elongation: Typically offers elongation at break above 20%, allowing parts to bend significantly before failure.
② Impact resistance: Capable of absorbing sudden impacts and reducing the risk of brittle fracture.
③ Fatigue resistance: Suitable for parts that undergo repeated mechanical movement or stress.
Limitations
① Lower stiffness: Parts may deform elastically under load and are not ideal for structures requiring high rigidity.
② More difficult surface finishing: Sanding may create rough edges, making mirror-like finishes harder to achieve.
③ Moderate heat resistance: Heat deflection temperatures are typically lower than those of rigid engineering resins.
Typical Applications:
Snap-fit components, clips, flexible hinges, shock-resistant housings, and functional prototypes requiring durability.
High Temperature Resin
High temperature resin is a high-performance material characterized by a high elastic modulus and excellent thermal stability. It is suitable for structural components or prototypes that must maintain dimensional stability under elevated temperatures.
Key Features
① High rigidity and dimensional stability: High modulus and low creep help maintain precise geometry over time.
② Excellent heat resistance: Heat deflection temperatures can exceed 150 °C in some formulations.
③ Strong creep resistance: Maintains shape even under continuous mechanical load.
Limitations
① Brittleness: Low elongation at break makes parts more susceptible to cracking under sudden impact.
② High internal stress: Polymerization shrinkage during curing can lead to warping, especially in large solid parts.
③ More complex processing: Achieving the rated material properties often requires carefully controlled post-curing.
Printing Tips:
●Hollow the model when possible. Adding sufficient drainage holes helps reduce internal stress during curing.
●Maintain a stable printing environment. Printing in a slightly warm environment can improve resin flow and printing stability.
●Use slower lift speeds. Lower lift speeds reduce peel forces during layer separation and help improve print reliability.
●Follow proper post-curing procedures. To achieve the rated material properties, secondary thermal curing should follow the resin datasheet specifications, including temperature, curing time, and heating rate.
Typical Applications：Thermoforming molds, fluid testing components, and functional prototypes designed for high-temperature environments.
High Precision Resin
High precision resins are designed for applications where fine details and dimensional accuracy are critical. These materials typically have very low curing shrinkage, allowing them to reproduce extremely small features while maintaining excellent dimensional fidelity.
Key Characteristics
① Exceptional detail reproduction
Capable of capturing micron-level features with sharp edges and highly defined surfaces.
②High dimensional accuracy
Very low volumetric shrinkage helps minimize deformation and ensures precise dimensions.
③Smooth surface finish
The cured surface is dense and smooth, making it suitable for electroplating or precision casting.
Limitations
①Mechanical strength and toughness are usually moderate, making the material unsuitable for load-bearing parts.
②Achieving optimal results often requires precise exposure calibration.
③Material cost is typically higher than standard resins.
Printing Tips:
Calibration: Use professional calibration models to fine-tune layer exposure times and achieve the best balance between detail resolution and dimensional accuracy.
Post-processing: Ensure models are fully dried after cleaning before UV curing, as residual solvent or moisture can affect surface quality. Finished parts can be used directly for silicone molding or precision assemblies.
Typical Applications：Jewelry casting patterns, miniature models, precision mechanical prototypes.
Flexible Resin
Flexible resins are formulated to simulate rubber-like materials, offering elasticity and resilience after curing.
Key Characteristics
①Rubber-like elasticity
Available in a wide hardness range, allowing the material to simulate textures from soft gel to firm rubber.
②High rebound performance
Parts can quickly return to their original shape after compression or stretching.
③Good tear resistance
Suitable for applications that require repeated deformation.
Limitations
①Printing can be challenging due to high viscosity and strong peel forces during layer separation.
②Support removal and surface finishing are more difficult than with rigid resins.
③Some flexible resins may gradually harden or become brittle over time.
Printing Tips:
Model design: Design self-supporting geometries whenever possible and avoid large cross-sections. Use multiple light-touch supports at the base of the model.
Print settings: Reduce lift speed significantly and increase rest times to minimize peel stress during printing.
Post-processing: Soaking the model in warm water can soften both the part and the supports, making removal easier. A rotating curing chamber is recommended to ensure even UV exposure.
Typical applications: functional seals, cushioning components, soft robotic joints, and deformable structures. They are also suitable for producing gaskets, protective pads, footwear prototypes, and other flexible parts.
Dental Resin
Dental resins are specialized materials developed for medical and dental applications. These materials are typically certified for biocompatibility and are intended for producing devices that may come into contact with the human body.
Key Characteristics
①Certified safety and biocompatibility
Manufactured to comply with strict medical standards that define approved usage scenarios.
②High precision and dental-grade coloration
Designed to meet the accuracy and appearance requirements of dental applications, including natural tooth or gum shades.
Limitations
①Dedicated equipment and controlled workflows are often required to prevent cross-contamination.
②Mechanical properties are optimized for medical compliance rather than general engineering performance.
Typical Applications：
Producing surgical implant guides, orthodontic aligner models, temporary crowns, and other precision dental tools and devices.
(2) Printer Performance Calibration
The print quality of resin-based 3D printing is determined by the coordinated performance of three core systems: the exposure system, motion control system, and environmental management. Each of these systems contains key parameters that must be properly adjusted. Optimizing the combination of these parameters is essential for achieving high-precision and high-strength prints.
To help users quickly locate and configure parameters for different types of resins, we have compiled a comprehensive resin printing parameter reference table. By using this reference table, users can gradually build a personalized parameter library tailored to different materials and printers, enabling them to progress from basic printing to precise process control.
(4)Application Expansion
This section introduces the complete workflow for finishing resin prints, from post-printing cleanup to achieving a high-quality painted surface. By removing print marks and refining the model surface, you can create miniatures with vibrant colors and sharp details.
Sanding and Polishing
After secondary curing, carefully remove the remaining support structures using a hobby knife or flush cutters. Trim any support marks to prepare the surface for sanding.
Depending on the model’s complexity and the desired surface quality, sanding is typically performed in three stages: rough sanding → fine sanding → polishing.
1. Rough Sanding: Removing Layer Lines and Support Marks
Use 180–800 grit sandpaper or sanding sponges to remove visible layer lines and support marks.
After sanding, rinse the model with water and clean the surface with a soft brush or toothbrush. The sandpaper can also be rinsed and reused.
2. Fine Sanding: Surface Refinement
Use 800–1800 grit sanding sponges to remove scratches left from rough sanding and further smooth the surface.
For narrow gaps or complex structures, cut small pieces of sandpaper and wrap them around a cotton swab for more precise sanding.
3. Polishing: Improving Surface Finish
Use 1800–2500 grit ultra-fine sanding sponges to polish the surface and achieve a smoother, more refined finish.
Surface Primer (Putty/Primer Layer)
1. Choosing the Right Primer
Gray Primer: A general-purpose option suitable for most paint bases.
Black Primer: Recommended for metallic paints or darker color schemes, as it enhances metallic depth.
White Primer: Ideal for bright or light-colored paint schemes.
2. Application Method
Dilute the primer with high-concentration alcohol or the appropriate thinner, then shake thoroughly.
Apply the primer using multiple thin coats, allowing about 10–15 minutes between layers to prevent paint buildup or dripping.
After the primer dries, inspect the model for small imperfections. If necessary, use modeling putty to fill minor surface defects.
Painting
Airbrushing / Spray Painting: Recommended for large surface areas. Using an airbrush or spray paint provides a more even coating. For light colors, apply multiple thin layers.
Wash or Wipe Techniques: For weathering effects or highlighting textures, apply diluted paint using a cloth, tissue, or brush.
Brush Painting: Suitable for small details and touch-ups. Apply paint carefully to maintain smooth brush strokes.
After painting is complete, apply a clear protective coat (gloss, satin, or matte depending on the desired finish). This protects the paint from wear and fading while also adjusting the final surface appearance.