---
title: Stereolithography (SLA) 3D Printing Services | Ineo
description: Stereolithography is an additive manufacturing technology (3D printing) used in Ineo for the creation of prototypes, models or final pieces.
date: 2018-11-29
url: https://ineo.es/en/technologies/industrial-additive-manufacturing/stereolithography-sla
---

# Stereolithography (SLA)

## Stereolithography (SLA) is an advanced 3D printing (additive manufacturing) technology used to produce epoxy resin components with exceptional detail definition and superior dimensional accuracy. At Ineo, we employ this process for projects where surface quality and geometric fidelity are critical, ensuring high-end technical results for every part.

**Stereolithography (SLA)**

It is the most appropriate technology when manufacturing the master model, to subsequently make silicone moulds or prototypes to verify the geometry and visual appearance of a product.

It is one of the first 3D printing technologies developed. At Ineo we have been using it since 2000 and today it continues to be a very used and reliable technology for the manufacture of rapid prototypes.

The small format stereolithography machines have a high resolution for the details; The large format ones are also precise and offer a tolerance of ± 0.2 mm.

Our experience with SLA technology **dates back to 2000**, allowing us to provide expert guidance in creating your master models and high-fidelity prototypes. At **Ineo**, we place our technical capacity and multi-format machinery at your service to ensure every component meets **the demands of your specific application**. Trust our long-standing track record to transform your designs into parts with exceptional finish and precision.

**Do you require a master model or prototypes with a high-fidelity surface finish? Would you like to explore how our expertise in 3D printing (SLA) can bring precision to your specific application?**

Talk to our technical team

[Quote Request](https://www.ineo.es/en/quote-request)

[Call us](https://www.ineo.es/tel:+34937337000)

[Email us](https://www.ineo.es/mailto:contact@ineo.es?subject=Contact from Site Ineo&body=)

[Send us a message](https://www.ineo.es/en/contact)

### What is stereolithography?

**Stereolithography** is an additive manufacturing technology for the 3D printing of prototypes, models or final pieces, through the union of epoxy resin layers polymerized by a low power ultraviolet laser.

![SLA Stereolithography scale car - Ineo](https://www.ineo.es/images/defaultcontent/ineo_placeholder.png)

### How does stereolithography work?

Starting from a 3D geometry to be manufactured, the manufacturing position is decided. A computer program organizes and translates the information of the file in STL format generating the information of each horizontal layer with a thickness depending on the required precision. The STL file is the interface used to translate 3D files.

A laser of ultraviolet light (UV) is drawing and solidifying these layers on the surface of the liquid epoxy resin contained in the deposit of the machine; each layer is adhered to the previous one by the effect of the laser. In order to fix the piece to the construction platform, supports must be made to stabilize the protruding surfaces during the process. The platform descends on each layer and these supports ensure that the manufactured part does not fall or deform.

Once this is made, these supports must be removed and go through a cleaning process. Finally, it must be subjected to a post-cure in an ultraviolet light oven to leave it totally solidified.

![SLA Stereolithography containers - Ineo](https://www.ineo.es/media/com_sppagebuilder/placeholder/technologies-stereolithography-sla-ineo-4-800x600.jpg)

### Applications of stereolithography

This technology, well considered for its precision and excellent surface finish, is used especially by technical offices, R & D departments, design centers of different industrial sectors (architecture, medicine) that require:

- Master piece to manufacture silicone molds
- Functional prototypes
- Models for presentation
- Pieces that will require a surface finish
- Pieces of excellent dimensional precision

![SLA Stereolithography brake pedal - Ineo](https://www.ineo.es/media/com_sppagebuilder/placeholder/technologies-stereolithography-sla-ineo-3-800x600.jpg)

### Advantages of stereolithography

Some of its strengths are:

- Manufacture of fast and complex prototypes
- Speed, precision and excellent reproduction of details
- Excellent surface finish
- Choice of different surface and painted finishes
- Different manufacturing materials: transparent, flexible, translucent

### Aspects to consider

Some considerations about the stereolithography:

- Depending on the resin used, the pieces can be fragile
- It is necessary to use supports to stabilize protruding surfaces during the manufacturing process of the pieces
- It is not recommended to nest pieces one over the other during manufacturing
- Some materials are sensitive to humidity and temperature

### Materials for 3D SLA printing

We offer various state-of-the-art materials for the manufacture of parts in stereolithography. On this page we present the main materials we work with and their most relevant characteristics, if you need a special material do not hesitate to contact us.

| Accura Xtreme |
| --- |
| Grey resin with good mechanical and thermal behaviour (60ºC), high dimensional reliability and excellent surface finish, easy to polish.Ideal for visual prototypes, assembly of assemblies and models for silicone molds, as well as functional parts.Density: 1.19 g / ccFlexural module: 1,520-2,070 MPaElongation at break: 14-22%   |

### Flexibility

### Temperature resistance

### Impact Resistance

| DSM 11122 |
| --- |
| Translucent resin that polished is transparent. Maximum working temperature: 50ºC, high dimensional reliability and excellent surface finish, easy to polish.Ideal for checking the behaviour of fluids, manufacturing visual prototypes and models for silicone molds and assembling of assemblies.Density: 1.12 g / ccFlexural module: 2,040-2,370 MPaElongation at break: 3.5% |

### Flexibility

### Temperature resistance

### Impact Resistance

| Robusta G |
| --- |
| Translucent white resin, with good mechanical behaviour, can be easily dyed to obtain coloured finishes. Good thermal behaviour (60ºC) with high dimensional reliability and excellent surface finish, easy to polish.Ideal for visual prototypes, assembly of assemblies and models for silicone molds, as well as functional parts.Density: 1.12 g / ccFlexural module: 2,276-2,390 MPaElongation at break: 15-20% |

### Flexibility

### Temperature resistance

### Impact Resistance

### Formlabs 4BL

This next-generation 3D printer allows us to manufacture parts with biocompatible materials, offering innovative solutions for industries such as medical, dental, and industrial sectors.

With **high production speed** and the ability to quickly switch materials, the Formlabs 4BL enables us to respond more efficiently to our customers' needs. Additionally, its **printing volume of 353mm x 196mm x 350mm** opens up new possibilities for producing custom and highly precise components.

Parts printed with this new technology feature **smoother surfaces, sharper details, and more precise assemblies**, achieving **dimensional tolerances of ±0.15%**, ensuring that all components fit together perfectly.

.

#### FAQs – Stereolithography (SLA) & High-Precision Resin Printing Insights

- **What is Stereolithography (SLA)?** SLA is a resin-based 3D printing technology that uses a UV laser to cure liquid photopolymer layer by layer, producing highly detailed and accurate parts.
- **What are the main advantages of SLA 3D printing?** SLA offers very high resolution, excellent surface finish and the ability to produce complex geometries with fine details, making it ideal for prototypes and visual models.
- **What materials are used in SLA printing?** SLA uses photopolymer resins, which can be formulated for rigidity, transparency, flexibility or high-temperature resistance depending on application requirements.
- **What is SLA typically used for in industry?** It is used for visual prototypes, design validation models, functional testing parts and detailed components in sectors such as automotive, medical and consumer products.
- **How does SLA compare to other 3D printing technologies?** Compared to FDM or MJF, SLA provides higher surface quality and precision but may offer lower mechanical strength depending on resin selection.
- **Can Ineo ship SLA printed parts internationally?** Yes, Ineo manufactures SLA parts in Barcelona, Spain, and ships prototypes and production parts across Europe and worldwide with full logistics support.

### National and International Delivery Times for 3D Printing Services

##### Need your parts ASAP?

Ineo provides high-speed 3D printing for professional applications, guaranteeing fast-turnaround deliveries with optimized lead times.

**We manufacture locally in Terrassa (Barcelona, Spain) and distribute worldwide**, offering streamlined production for **end-use parts, prototypes, functional testing, and urgent technical series**.

📦 **No minimum order quantity – Guaranteed delivery times – Technical support**

##### 3D Printing Delivery Times in Spain:

###### Small-Scale Parts

- **Resin (SLA) → 2-3 business days**
- **Biocompatible resin (Formlabs 4BL) → 3 business days**

###### Large-Scale Parts

- **Resin (SLA) → 4-7 business days**

##### Deliveries to Canary Islands, Balearics, Ceuta & Melilla:

Shipments to these regions may require 1-5 additional business days due to logistics and (for Canary Islands) customs processing.

##### International 3D Printing Deliveries:

Orders outside Spain require extended lead times. Additional delivery time varies by destination country and local logistics/customs factors.

For precise international delivery estimates, contact our customer service team.

### Ready to manufacture your parts?

[Request a quote](https://www.ineo.es/en/quote-request)[Call us](https://www.ineo.es/tel:+34937337000)[Send us an email](https://www.ineo.es/mailto:contact@ineo.es?subject=Contact from Site Ineo&body=)[3D Printing Online](https://www.ineo.es/impresion3donline)

INEO PROTOTIPOS S.L.

C/Avenc del Daví, 6 Pol.Ind.Can Petit

Terrassa, Barcelona 08227

Tel. [+34 937 337 000](https://www.ineo.es/tel:+34937337000)

Email: [contact@ineo.es](https://www.ineo.es/mailto:contact@ineo.es) 

Web: [https://www.ineo.es](https://www.ineo.es)

[Follow on LinkedIn 1.2K](https://www.linkedin.com/company/39887766)

Found this useful? Share it:

© [INEO Prototipos](https://www.ineo.es) | [Legal Notice](https://www.ineo.es/en/legal-notice) | [Privacy Policy](https://www.ineo.es/en/privacy-policy) | [Cookies Policy](https://www.ineo.es/en/cookies-policy) | [Terms and conditions](https://www.ineo.es/en/terms-conditions) | [Contact](https://www.ineo.es/en/contact) | [Sitemap](https://www.ineo.es/en/sitemap)

### JSON Schema