SLA, DLP & LCD | ISO 9001 Certified Resin Printing Facility
Resin 3D Printing Services
Resin 3D printing produces smooth, highly detailed parts by curing liquid photopolymer resin with UV light. The best technology depends on your needs — SLA for the smoothest surfaces, DLP for fast batch production, and LCD/MSLA for cost-effective high resolution.
At Baetro, we operate 30+ industrial resin printers across SLA, DLP, and LCD technologies from our ISO-certified facility in Qingdao. Whether you need a single dental model, a batch of jewelry casting patterns, or engineering prototypes with injection-mold-like surface finish, we ship resin 3D printed parts in 3–7 days with no minimum order quantity.
±0.05 mm
Tolerance capability
3–7 days
Standard lead time
8+ Resins
Material options
MOQ 1
No minimum order
Resin 3D Printing Fundamentals
What Is Resin 3D Printing?
Resin 3D printing — also called vat photopolymerization — builds parts layer by layer from liquid photopolymer resin. A light source (UV laser, digital projector, or LCD mask) cures each cross-section, solidifying the resin into a precise shape. The build platform lifts, fresh resin flows across the vat, and the next layer cures on top.
The result is a part with exceptional detail resolution and a surface finish that no other additive technology matches. Where FDM 3D printing leaves visible layer lines and SLS 3D printing produces a slightly grainy texture, resin printing delivers surfaces smooth enough for optical lenses and jewelry master patterns. Resin parts are also isotropic — their strength is uniform in all directions.
Exceptional Surface Finish
Smooth as injection molding, Ra 1–5 µm as-printed
Fine Detail Resolution
Features down to 0.2 mm with 25 µm layers
Isotropic Strength
Uniform mechanical properties in all directions
Wide Material Range
8+ resin categories from standard to biocompatible
Smoothest Additive Surface
Ideal for optical lenses, jewelry masters, dental models, and visual prototypes.
Resin Capabilities
Resin 3D Printing Technologies Compared
Not all resin printing is the same. SLA, DLP, and LCD/MSLA each use a different light source to cure resin, and that choice directly impacts speed, resolution, surface finish, and cost.
SLA resin printing
SLA (Stereolithography)
A UV laser traces each cross-section point by point across a vat of liquid resin. SLA produces the smoothest curves and finest surface details of any resin process.
- Best for: highest surface quality, large smooth parts, dental, optical.
- Tolerance: ±0.05–0.15 mm with layer heights as fine as 25 µm.
- Trade-off: slower than DLP or LCD for large or dense layers.
DLP resin printing
DLP (Digital Light Processing)
A digital projector flashes an image of an entire layer across the resin tank simultaneously. DLP is significantly faster than SLA for batch production.
- Best for: batch production of small detailed parts, jewelry, dental models.
- Advantages: layer time is constant regardless of part count per layer.
- Accuracy: ±0.05 mm XY accuracy with smooth, detailed surfaces.
LCD/MSLA printing
LCD / MSLA (Masked SLA)
An LCD screen displays a black-and-white image of each layer, and a UV LED array shines through to cure the resin. Best price-to-resolution ratio.
- Best for: cost-effective prototyping, miniatures, concept models.
- Resolution: 12K–16K screens achieve XY tolerances of ±0.1 mm.
- Benefits: full-layer curing speed at lower equipment cost than DLP.
Procurement confidence
Why Choose Baetro for Resin 3D Printing?
Engineers and product teams choose Baetro for reliable resin 3D printing services with fast quoting, tight tolerances, transparent documentation, and responsive project support.
Free DFM Feedback
Our engineers review every CAD file and suggest design optimizations that reduce print time, improve surface quality, and lower cost before production begins.
Instant Online Quotes
Upload your STL or STEP file, select resin and technology, then receive pricing and lead time in under 60 seconds without waiting for manual sales follow-up.
±0.05 mm Tolerance Capability
Industrial SLA and DLP systems support tight tolerances on complex geometries, with dimensional inspection and full documentation when required.
30+ Industrial Resin Printers
Our Qingdao facility operates 30+ resin printers across SLA, DLP, and LCD technologies, giving Baetro the capacity to handle single prototypes and batch production.
No Minimum Order Quantity
Order one prototype or scale to production volumes with the same resin printing process, quality controls, and material traceability across every order size.
Fast Lead Times & Documentation
Standard orders ship in 3–7 days, with inspection reports, material certifications, surface finish verification, and dedicated project manager support included.
Material library
Resin Materials for Every Application
We offer 8+ resin categories across standard, engineering, and specialty formulations, with full material certifications and traceability available for every project.
Engineering Resins
Standard: Grey, white, and black resins deliver the smoothest surface finish at the lowest cost. Ideal for concept models, display pieces, and architectural models.
Tough / ABS-Like: Mimic impact resistance and durability of ABS plastic. Tensile strength 40–60 MPa for snap-fits, enclosures, and functional prototypes.
Flexible: Shore A range from soft rubber-like gaskets to firmer TPE-like grips. Used for seals, overmold prototypes, ergonomic handles, and wearables.
High-Temperature: Maintain stability up to 200–300°C. Used for injection mold inserts, thermoforming molds, and under-hood automotive prototypes.
Specialty Resins
Clear / Optical: High transparency off the printer; can be post-processed to optical clarity. Applications include light guides, fluidic channels, transparent enclosures, and lenses.
Castable: Burn out cleanly with minimal ash residue. Standard for jewelry casting patterns and precision investment casting masters.
Dental / Biocompatible: Formulated for patient contact, sterilizability, and precision fit. Surgical guides, dental models, aligner molds, and hearing aid shells.
ESD-Safe: Dissipate static electricity for electronics manufacturing fixtures, jigs, and housings where uncontrolled static could damage PCBs.
Material
Standard Resin
Smooth visual prototypes with surface roughness as low as Ra 1–2 µm. Lowest cost option for display and concept models.
Material
Tough / ABS-Like
Impact-resistant resin for snap-fits, enclosures, and mechanical prototypes. 40–60 MPa tensile strength.
Material
Dental / Biocompatible
Patient-contact resins meeting FDA and CE requirements for surgical guides, models, and hearing aids.
Material
Clear / Optical
High-transparency resin for lenses, light guides, and fluidic channels. Post-processable to optical clarity.
Post-processing
Surface Finish & Post-Processing Options
As-printed resin surface roughness ranges from Ra 1–5 µm — comparable to injection molding. We offer multiple post-processing levels to match your application.
| Finish | Description | Best For |
|---|---|---|
| Natural (as-printed) | Smooth surface straight off the printer, Ra 1–5 µm | Functional prototypes, fit checks, engineering validation |
| Sanded and polished | Progressive sanding to smooth matte or gloss finish | Display parts, investor presentations, marketing models |
| Clear coated | Progressive sanding plus optical resin coating | Lenses, light guides, fluidics, transparent enclosures |
| Painted | Custom colors and textures applied to sanded surface | Consumer product prototypes, color-matched models |
| Vapor smoothed | Chemical smoothing for enhanced gloss (select resins) | High-gloss cosmetic parts, decorative components |
| Standard workflow | Wash (IPA) → UV post-cure → support removal | All resin parts to reach final mechanical properties |
Every resin part requires wash, cure, and finishing. Wash removes uncured resin in isopropyl alcohol. UV post-cure fully polymerizes the resin in a controlled chamber (2–30 minutes depending on resin type). Supports are removed before post-curing to minimize scarring.
Engineering data
Tolerances, Accuracy & Build Specifications
Resin 3D printing is one of the most precise additive manufacturing technologies available. At Baetro, we maintain tight process control to ensure your parts meet specification every time.
Dimensional Tolerances by Technology
| Technology | General Tolerance | Min Feature Size | Min Wall Thickness |
|---|---|---|---|
| SLA | ±0.05–0.15 mm | 0.3 mm | 0.5 mm |
| DLP | ±0.05 mm | 0.2 mm | 0.5 mm |
| LCD / MSLA | ±0.1 mm | 0.3 mm | 0.5 mm |
Holes printed horizontally tend to be slightly undersized due to resin shrinkage. For press fits, design holes 0.1–0.2 mm oversized and ream to final dimension post-print. Standard resins shrink 3–6% volumetrically during curing; rigid resins shrink only 1–3%.
Build Specifications
- Build volume (SLA): up to 335 x 200 x 300 mm. DLP and LCD systems are optimized for detail and batch density.
- Layer heights: 25 µm (ultra-fine detail) to 100 µm (standard resolution). Most engineering prototypes use 50 µm.
- File formats: STL preferred. STEP, IGES, SLDPRT, and X_T also accepted.
- Overhangs: Supports required for overhangs greater than 30° from horizontal and all bridges.
- Shrinkage compensation: We apply scaling factors in the slicer for tight-tolerance parts. Allow 0.15–0.3 mm clearance for sliding parts.
Quality & Design
Quality Assurance & DFM Guidance
Quality is built into every stage of our resin 3D printing process, from material verification to final dimensional inspection. Our engineers also provide free design guidance to optimize your parts.
Our Quality Systems
- ISO 9001 certified quality management system
- AS9100 certified for aerospace quality standards
- Full material traceability from raw resin to finished part
- Monthly CMM calibration and weekly laser power verification
- Dimensional inspection reports with every shipment
- Surface roughness validation for finish-critical parts
- First article inspection reports for production approval
- 100% inspection or AQL sampling per customer requirements
DFM Tips for Resin Printing
Small design decisions have a large impact on resin print quality, cost, and post-processing time. Key guidelines from our engineering team:
- Wall thickness: Minimum 0.5 mm for rigid resins; 1.0 mm for flexible resins.
- Orientation: Orient critical surfaces away from supports to avoid scarring.
- Drain holes: Add at least two 3.5 mm drain holes at lowest points of hollow cavities.
- Clearances: Allow 0.15–0.3 mm clearance for sliding parts; 0.1–0.2 mm for press fits.
- Text depth: Embossed or engraved text should be at least 0.3 mm.
Applications
Industries We Serve with Resin 3D Printing
Resin 3D printing supports industries where precision, detail, or surface quality is non-negotiable. Here is how Baetro customers use resin printing across sectors.
Industry
Dental & Medical
Crown and bridge models, surgical guides, aligner molds, denture bases, and hearing aid shells using biocompatible resins with ±0.05 mm accuracy and full traceability.
Industry
Jewelry & Accessories
Castable resin master patterns capturing filigree, micro-pavé settings, and organic textures. Clean burn-out properties leave smooth cavity surfaces in investment molds.
Industry
Consumer Products
Investor presentation models, focus group prototypes, and design validation parts with injection-mold-like surface finish for aesthetic and ergonomic evaluation.
Industry
Engineering & Prototyping
Fit checks, assembly validation, and form studies using tough and high-temperature resins. Clear resins enable fluid flow visualization and optical prototyping.
Industry
Automotive & Aerospace
High-temperature resin molds and tooling inserts for composite layup, thermoforming, and injection molding trials with complex cooling channels.
Industry
Electronics
ESD-safe resins for manufacturing fixtures, test jigs, and housings. Transparent resins for light guides and enclosures with precise PCB hole patterns.
Pricing & Lead Times
Resin 3D Printing Pricing & Delivery
Resin 3D printing cost depends on technology choice, resin material, part volume, and post-processing requirements. Every quote includes exact pricing and free DFM feedback.
Prototype & Single Parts
No minimum order quantity. Order one part for design validation without tooling commitments.
- Standard resins on LCD/MSLA: most cost-effective
- SLA premium surface finish for presentation models
- 3–7 day standard lead times
- Free DFM feedback on every quote
- Typical range: $5–45 per part depending on size
Low-Volume Batches
10–1,000 parts with cost-effective DLP or LCD batch printing and flexible scheduling.
- DLP layer time is constant regardless of part count
- Consistent quality across batches
- Easy design changes between runs
- Ideal for product launches and bridge production
- Batch pricing reduces per-part cost significantly
Expedited & Production
Rush prototypes in 1–2 days or scale to dedicated printer capacity for repeat production.
- Expedited 1–2 day delivery available for urgent prototypes
- Dedicated machines for consistent throughput
- Full inspection reports and material certifications
- Sea freight options for large-volume orders
- Express 3–5 days worldwide shipping
How it works
Our Resin 3D Printing Process
Working with Baetro is straightforward. Here is the controlled process from CAD file upload to finished resin 3D printed parts.
Upload Your CAD File
Send your design in STL, STEP, IGES, SolidWorks, or Parasolid format. STL is preferred for resin 3D printing quotes.
Receive Quote + DFM Feedback
In under 60 seconds, review pricing, lead time, and manufacturability notes for wall thickness, drain holes, and support placement.
Select Technology & Resin
Our engineers recommend the optimal SLA, DLP, or LCD process and resin type based on your part geometry, tolerance, and budget.
Print, Wash & UV Cure
Parts are printed layer by layer, then washed in isopropyl alcohol to remove uncured resin, followed by controlled UV post-curing.
Support Removal & Finishing
Supports are removed and light scars are sanded or polished away. Optional clear coating, painting, or vapor smoothing applied.
Inspect & Ship with Docs
Final dimensional inspection, surface finish verification, and packaging with inspection reports and material certifications.
Cost considerations
Resin 3D Printing Cost Factors
Understanding what drives resin 3D printing costs helps you make informed design and material decisions.
- Technology: SLA is typically highest cost per part due to slower speeds. DLP and LCD/MSLA offer lower per-part costs, especially for batches.
- Resin Material: Standard grey resin is most cost-effective. Dental, biocompatible, and high-temperature resins cost 2–4x more.
- Part Volume: Cost scales with resin consumed. Hollow parts with drain holes cost significantly less than solid parts.
- Post-Processing: Basic wash and cure is included. Sanding, polishing, clear coating, and painting are available at additional cost.
- Order Quantity: Low volumes have higher per-part cost due to setup; high volumes reduce per-part cost on DLP/LCD.
- Lead Time: Standard 3–7 day lead times included; expedited 1–2 day delivery increases cost.
FAQ
Frequently Asked Questions
Answers to common questions about resin 3D printing tolerances, materials, lead times, technologies, finishes, and quality control.
What is resin 3D printing?
Resin 3D printing is an additive manufacturing process that builds parts by curing liquid photopolymer resin with UV light. Technologies include SLA (laser-based), DLP (projector-based), and LCD/MSLA (screen-mask-based). It produces the smoothest surface finish and finest detail of any 3D printing technology, with as-printed roughness as low as Ra 1–5 µm.
SLA vs. DLP vs. LCD: which resin technology is best?
It depends on your priorities. SLA delivers the smoothest surfaces and highest accuracy for large, detailed parts. DLP is fastest for batch production of small parts because it cures entire layers in one flash. LCD/MSLA offers the best cost-to-resolution ratio for prototypes and miniatures. Our engineers recommend the optimal technology based on your part geometry, material, and budget.
How much does resin 3D printing cost?
Resin 3D printing typically costs $5–45 per part depending on size, technology, and resin type. Standard resins on LCD/MSLA are the most cost-effective. Dental, biocompatible, and high-temperature resins cost more due to specialized formulations. Upload your CAD file for an exact instant quote with live pricing.
How accurate is resin 3D printing?
Industrial resin 3D printing holds tolerances of ±0.05–0.15 mm depending on the technology. SLA and DLP achieve the tightest tolerances at ±0.05 mm. Layer heights range from 25–100 µm, enabling fine details down to 0.2 mm. Holes printed horizontally may be slightly undersized; we recommend 0.1–0.2 mm oversize for press fits.
What materials can be used in resin 3D printing?
Baetro offers eight resin categories: standard, tough/ABS-like, flexible, high-temperature, clear/optical, castable, dental/biocompatible, and ESD-safe. Each resin is formulated for specific mechanical, thermal, or regulatory requirements. Browse our full engineering materials selection.
What is the surface finish of resin 3D printed parts?
As-printed resin parts achieve surface roughness of Ra 1–5 µm — nearly injection-mold quality and significantly smoother than FDM. With sanding, polishing, or clear coating, surfaces can reach optical clarity or high-gloss finishes suitable for presentation and end-use. We also offer vapor smoothing and custom painting.
Can resin 3D printed parts be used for dental or medical applications?
Yes. Baetro prints dental models, surgical guides, and hearing aid shells using biocompatible resins that meet FDA and CE requirements for patient contact. Our ISO 9001 and AS9100 certified quality systems ensure consistent, traceable production for medical device applications.
How do I design parts for resin 3D printing?
Key design rules: maintain 0.5 mm minimum wall thickness, add drain holes (minimum 3.5 mm) to hollow parts, orient critical surfaces away from supports, and allow 0.1–0.2 mm clearance for press fits to compensate for resin shrinkage. Our engineers provide free DFM feedback on every quote to help you optimize your design.
Quote-ready manufacturing
Get Started with Resin 3D Printing
Resin 3D printing gives you smooth, detailed parts with tolerances to ±0.05 mm and surface finish that rivals injection molding. Whether you need a single dental model, a batch of jewelry casting patterns, or engineering prototypes for design validation, Baetro delivers in 3–7 days with no minimum order.
Upload your STL or STEP file now and get an instant quote with live pricing, lead times, and free DFM feedback from our engineering team. We will match your part to the optimal resin and technology — so you get the right part, at the right price, on the right timeline.
Parts ship in 3–7 days. No minimum order quantity. ISO 9001 & AS9100 certified.
Not ready to upload a file? Contact our engineers to discuss your project, review material options, or get guidance on technology selection.