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Stereolithography (SLA) 3D Printing Service

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Materials
Applications and Benefits
Sizes and Tolerances
About SLA
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High-Resolution, Accurate Parts without Tooling

Stereolithography (SLA) is a powerful 3D printing technology that produces extremely accurate and high-resolution parts that are capable of being used directly in end-use, low-volume production, or for rapid prototyping. Xometry offers over 15 uniquely engineered SLA materials that can enable products to be brought to the market

    Use the 3D viewer above to preview Xometry’s part rendering features.

    Stereolithography Materials

    SLA Materials Available at Xometry:
    Material NameDescriptionFlexural Strength (MPa/KSI)Elongation at Break (%)[email protected] MPa (°C)Data Sheets
    Material Name

    Accura 25

    Description

    White, PP-like

    Flexural Strength (MPa/KSI)

    58 MPa/KSI

    Elongation at Break (%)

    20%

    63 °C

    Data Sheets

    Accura 25 Data Sheet

    Material Name

    Accura ClearVue

    Description

    Clear/Translucent, PC-like

    Flexural Strength (MPa/KSI)

    67 MPa/KSI

    Elongation at Break (%)

    7%

    46 °C

    Data Sheets
    Material Name

    Somos Watershed Black

    Description

    Black/Dark-Grey, ABS-like

    Flexural Strength (MPa/KSI)

    69 MPa/KSI

    Elongation at Break (%)

    15%

    50 °C

    Data Sheets
    Material Name

    Somos WaterShed XC 11122

    Description

    Clear/Translucent, ABS-like

    Flexural Strength (MPa/KSI)

    69 MPa/KSI

    Elongation at Break (%)

    15%

    50 °C

    Data Sheets
    Material Name

    Somos EvoLVe 128

    Description

    White, ABS-like

    Flexural Strength (MPa/KSI)

    70 MPa/KSI

    Elongation at Break (%)

    11%

    52 °C

    Data Sheets
    Material Name

    Accura Xtreme Grey

    Description

    Grey, ABS-like

    Flexural Strength (MPa/KSI)

    71 MPa/KSI

    Elongation at Break (%)

    22%

    62 °C

    Data Sheets
    Material Name

    Somos NeXt

    Description

    White, PP-like

    Flexural Strength (MPa/KSI)

    71 MPa/KSI

    Elongation at Break (%)

    10%

    57 °C

    Data Sheets
    Material Name

    Somos ProtoGen 18420

    Description

    White, ABS-like

    Flexural Strength (MPa/KSI)

    71 MPa/KSI

    Elongation at Break (%)

    16%

    47 °C

    Data Sheets
    Material Name

    Somos Taurus

    Description

    Dark Gray, ABS-like

    Flexural Strength (MPa/KSI)

    74 MPa/KSI

    Elongation at Break (%)

    24%

    62 °C

    Data Sheets
    Material Name

    Accura ABS Black (SL 7820)

    Description

    Black (painted), ABS-like

    Flexural Strength (MPa/KSI)

    78 MPa/KSI

    Elongation at Break (%)

    13%

    51 °C

    Data Sheets
    Material Name

    Accura Xtreme White 200

    Description

    White, ABS-like

    Flexural Strength (MPa/KSI)

    79 MPa/KSI

    Elongation at Break (%)

    20%

    47 °C

    Data Sheets
    Material Name

    Somos WaterClear Ultra 10122

    Description

    Clear/Translucent, PC-like

    Flexural Strength (MPa/KSI)

    84 MPa/KSI

    Elongation at Break (%)

    7%

    47 °C

    Data Sheets
    Material Name

    Accura 60

    Description

    Clear/Translucent, PC-like

    Flexural Strength (MPa/KSI)

    101 MPa/KSI

    Elongation at Break (%)

    13%

    55 °C

    Data Sheets
    Material Name

    Somos ProtoTherm 12120*

    Description

    Translucent Red, PC-like

    Flexural Strength (MPa/KSI)

    109 MPa/KSI

    Elongation at Break (%)

    4%

    126 °C

    Data Sheets
    Material Name

    Accura 48HTR*

    Description

    Translucent Amber, PC-like

    Flexural Strength (MPa/KSI)

    118 MPa/KSI

    Elongation at Break (%)

    7%

    130 °C

    Data Sheets
    Material Name

    Somos PerFORM*

    Description

    White, Ceramic-filled

    Flexural Strength (MPa/KSI)

    146 MPa/KSI

    Elongation at Break (%)

    1%

    268 °C

    Data Sheets
    Material Name

    Accura Bluestone*

    Description

    Blue, Ceramic-filled

    Flexural Strength (MPa/KSI)

    154 MPa/KSI

    Elongation at Break (%)

    2%

    284 °C

    Data Sheets

    *Requires post-thermal curing to achieve HDT.
    Review more information about our materials here and check out our Stereolithography 3D Printed Materials FAQ.

    Available Finishes for SLA Printed Parts

    SLA mixed materials with matte finish
    Matte (Standard)
    SLA mixed materials with matte finish

    Supported surfaces will be lightly sanded with 220 or 320 grit sandpaper, then media blasted for a uniform matte finish.

    Natural
    SLA stereolithography natural finish

    Supported surfaces will be lightly sanded with 220 or 320 grit sandpaper for improved surface quality. Sanding scratches will be visible on supported surfaces.

    Strip and Ship
    SLA part with supports removed

    Supported areas may show small grid-like dots or surface blemishes as a result of support removal.

    Quick Clear
    SLA Accura ClearVue Quick Clear finish

    Available for Accura ClearVue. Only supported surfaces are sanded. Parts will still have visible layering.  High gloss clear coat is applied to enhance natural clarity.

    Custom
    SLA nickel plated finish

    Xometry provides additional SLA finishing options, including but not limited to sanding, polishing, painting, post thermal processing, and plating to meet your needs.

    Stereolithography SLA 3D printing services

    Ready to get started on your 3D printing quote?

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    Applications of Stereolithography (SLA) 3D Printing

    Concept models

    Concept Models

    The speed, accuracy, and great surface finish of SLA parts lets product developers create physical snapshots of their designs through the iterative process.

    Fast parts and fast shipping

    Rapid Prototyping

    SLA prototyping is a fully-functional prototype, with materials that can simulate polypropylene, polycarbonate, ABS, and rigid composites.

    Digital manufacturing

    Direct Digital Manufacturing

    The high accuracy and consistency of SLA makes it an ideal way to build large quantities of discrete or customized parts.

    Benefits of SLA 3D Printing

    SLA is a go-to choice for 3D printed models that require accurate features and a smooth surface finish. Xometry's stereolithography 3D printing service offers both standard and high-resolution options for fine detail parts, and can also print larger sized parts and products, offering up to a 29" inch build area. With the ability to produce complex features with good mechanical properties, an SLA 3D print is often used for final fit checks before moving to injection molding services.


    In addition, Xometry's manufacturing partner network allows us to offer a larger variety of materials than other 3D printing companies - we offer a wide range of both Accura and Somos brand materials.

    • Outstanding surface finish and post processing options
    • Tight tolerances and high detail precision
    • Complex shapes with a high degree of precision
    • High selection of engineered materials
    SLA machine 3D printing black parts using a UV laser

    SLA General Tolerances

    DescriptionStandard ResolutionHigh Resolution
    Description

    Build envelope

    Standard Resolution

    29” x 25” x 21”

    High Resolution

    10” x 10” x 10”

    Description

    Layer height

    Standard Resolution

    0.004"

    High Resolution

    0.002"

    Description

    Tolerance, XY Plane

    Standard Resolution

    +/- 0.005” for the first inch is typical, plus +/- 0.002” for every inch thereafter.

    High Resolution

    +/- 0.005” for the first inch is typical, plus +/- 0.002” for every inch thereafter.

    Description

    Tolerance, Z Plane

    Standard Resolution

    +/- 0.010” for the first inch is typical, plus +/- 0.002” for every inch thereafter.

    High Resolution

    +/- 0.010” for the first inch is typical, plus +/- 0.002” for every inch thereafter.

    Description

    Minimum linear feature size

    Standard Resolution

    Under 0.030” are at risk and under 0.020” will not build.

    High Resolution

    Under 0.020” are at risk and under 0.010” will not build.

    Description

    Minimum radial feature size

    Standard Resolution

    0.035"

    High Resolution

    0.030"

    The table below depicts the general tolerances for industrial-grade stereolithography (SLA) services. Stresses during the build, support strategy, and other geometry considerations may cause deviation in tolerances and flatness. Improved tolerances may be possible with a manual quote review, after successful completion of a prototype build, and must be approved on a case-by-case basis. General tolerances apply before secondary finishing or post-processing unless otherwise specified. Please check out Xometry's Manufacturing Standards for more information on tolerances per process.

    Overview: What is Stereolithography (SLA) 3D printing?

    How Stereolithography Works

    The stereolithography process is an additive manufacturing process that uses ultraviolet (UV) light on a vat of liquid photopolymer resin to selectively solidify part features, building the part layer by layer. The UV light continues this process through the entire vat of resin, selectively curing and solidifying the resin to match the design of the CAD file. Support structures are created during the pre-build setup process and manually removed after the print is completed. The parts are then washed in a solvent solution to remove uncured resin, and then receive a final post-cure in a UV light oven.


    Xometry's SLA printing service offers higher resolution printing than many other 3D printing technologies, allowing customers to print parts with fine details and surface finishes. SLA 3D printing is a highly-versatile platform for making custom parts in prototype and production settings, often acting as a stand-in for injection molded parts.


    Applications of Stereolithography

    With a broad range of suitable materials and a rapid turnaround for even complex net-shapes, SLA technology is an ideal tool for a broad range of manufacturing sectors. It is primarily used in auto-engineering, as it enables the cost-effective generation of intricate parts with various surface finishes and fine detailing. Parts can be embossed or engraved, with matte, natural, and myriad other finishes available depending on the manufacturing requirements. While its primary success has been in rapid, functional prototyping and design assistance for the automotive sector, stereolithography is rapidly being adopted at scale in various mechanical modeling sectors.

    Stereolithography SLA 3D printing services

    Why Choose Xometry for 3D Printing?

    Massive Network Capacity

    Endless Options

    Choose from millions of possible combinations of materials, finishes, tolerances, markings, and certifications for your order.

    Instant Quoting Engine

    Easy to Use

    Get your parts delivered right to your door without the hassle of sourcing, project management, logistics, or shipping.

    Guaranteed Quality

    Vetted Network

    We are ISO 9001:2015, ISO 13485, and AS9100D certified. Only the top shops that apply to become Suppliers make it through our qualification process.

    Xometry Image

    Download the SLA design guide