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DLP · Digital Light Processing

Digital light processing.

DLP projects an entire layer at once through a UV light engine — faster than SLA point-scanning and with exceptional surface quality. Ideal for high-throughput resin printing where detail and surface finish are critical.

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DLP machine specs
Build Volume218 × 122 × 220 mm
PrinterElegoo Saturn 4 Ultra
Tolerance± 0.05 mm
Layer Height0.025 – 0.10 mm
XY Resolution28 µm (0.028 mm)
Starting priceFrom $18 / part
Lead time2–3 business days
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DLP vs SLA

HOW DLP DIFFERS
FROM SLA

DLP — Whole Layer at Once

A UV projector flashes the entire cross-section simultaneously. Print speed is nearly constant regardless of the number of parts in a build — ideal for batch production.

  • Faster for full build plates
  • Consistent layer exposure
  • Pixel-based — excellent for flat features
  • Lower cost per part at volume
SLA — Point-by-Point Laser

A laser traces each cross-section one point at a time. Slower for complex or filled layers, but can achieve very fine minimum feature sizes on tall, narrow geometries.

  • Better for very tall, narrow parts
  • Laser spot can follow any path
  • Slower when layer area is large
  • Formlabs Form 4 ecosystem
Print Quality

THREE QUALITY LEVELS

Precise
0.025 mm+80% time

Maximum resolution for dental models, jewelry masters, and optical parts. Near-invisible layer lines.

Recommended
Normal
0.050 mmStandard

Balanced quality and speed. Recommended for most DLP applications — prototypes, enclosures, functional parts.

Fast
0.100 mm−45% time

Lower resolution but fast throughput. Good for quick design iterations and fit checks.

Materials

6 RESINS
AVAILABLE

Standard Resin
Smooth surface · High detail · Affordable
Heat
50°C
Strength
Medium
Price
$0.48/cm³

Best entry-point resin for display models, concept parts, and anything requiring a smooth finish at low cost.

ABS-Like Resin
Tough · Impact resistant · Engineering
Heat
70°C
Strength
High
Price
$0.58/cm³

Simulates ABS toughness in a photopolymer. Excellent for snap fits, functional enclosures, and mechanical prototypes.

Clear Resin
Transparent · Optical quality · Smooth
Heat
55°C
Strength
Medium
Price
$0.65/cm³

Near-optical transparency after post-processing. Used for lenses, fluid channels, light pipes, and display covers.

Flexible Resin
Rubber-like · Shore 50A · Tear resistant
Heat
45°C
Strength
Flexible
Price
$0.72/cm³

Shore 50A elastomeric resin with excellent tear resistance. Perfect for gaskets, grips, and wearable device prototypes.

High-Temp Resin
Heat resistant · 200°C+ · Engineering
Heat
200°C+
Strength
High
Price
$0.85/cm³

Withstands temperatures above 200°C. Used for thermoforming tools, under-hood automotive parts, and LED housings.

Dental Model Resin
Dental grade · High accuracy · Biocompatible
Heat
50°C
Strength
Medium
Price
$0.95/cm³

High-accuracy dental model resin with Class I biocompatibility. Prints study models, surgical guides, and orthodontic parts.

Applications

WHAT WE PRINT

Product Prototypes

Smooth-surface concept models and show parts that look production-ready straight off the printer.

Dental & Medical

Study models, surgical guides, and orthodontic appliances with sub-50 µm accuracy.

Optical Components

Clear resin lenses, light pipes, and fluid-channel microfluidic chips with optical clarity.

Jewelry & Art

Intricate jewelry masters, sculptures, and patterns with detail too fine for FDM.

Consumer Electronics

Enclosures, button caps, and lens covers that match injection-mold appearance.

High-Temp Tooling

Thermoforming and vacuum-forming tools, LED housings, and under-hood automotive fixtures.

FAQ

COMMON QUESTIONS

How is DLP different from SLA?

Both cure liquid resin with UV light, but DLP projects the full layer at once while SLA traces it with a laser point. DLP is faster for full build plates; SLA can have a finer spot size for very narrow, tall features.

Is DLP suitable for functional parts?

Yes — especially with ABS-Like and High-Temp resins. DLP parts reach 60–200°C heat resistance depending on the resin. For structural or impact-critical parts, FDM Nylon or SLS are still better choices.

How do I get clear transparent parts?

Print in Clear Resin at the Precise quality setting (0.025 mm layers), then wet-sand through 400→2000 grit and apply a UV-curing clear coat. This achieves near-optical clarity.

Can DLP parts be painted or dyed?

Yes. Standard and ABS-Like resins accept acrylic paints and spray lacquers after light sanding. Flexible resin requires flexible-formula paints to avoid cracking.

What is the minimum feature size?

Our DLP system has an XY resolution of 28 µm (0.028 mm). Minimum printable feature: ~0.1 mm wall thickness, 0.2 mm hole diameter. Z resolution is controlled by layer height — down to 0.025 mm.