Deep-black SLA resin for functional prototypes: Accura Xtreme Black at Speedpart

The requirements for 3D-printed plastic parts are increasing: development departments expect prototypes that closely resemble series-production parts in terms of geometry, level of detail and haptics. Especially for form, fit and function tests, a “pure display model” is often no longer sufficient. With Accura Xtreme Black, a new SLA resin is now available that is tailored precisely to these application scenarios. The service provider Speedpart was one of the first to add the material to its portfolio and uses it to manufacture customer-specific components.

Accura Xtreme Black comes from 3D Systems and is processed using the stereolithography process. The material is designed for mechanically loaded components such as robust housings, snap-fit connections or functionally close assemblies. According to Speedpart, fine details can be reproduced with layer thicknesses starting at 0.05 millimeters; minimum wall thicknesses of 0.25 millimeters and tolerances in the range of ±0.03 millimeters support complex, tightly toleranced geometries. Even with the standard finish, a smooth surface is achieved that visually resembles injection-molded parts and is suitable for design reviews.

For higher visual requirements, the surface can be blasted, resulting in a uniform, matte anthracite finish. In addition, a fine-finish process is available in which visible areas are specifically reworked and smoothed. This makes the material suitable for representative front panels, visible electronics housings or trade fair exhibits. The deep-black coloration is aligned with typical series materials and facilitates the simulation of later production parts.

At Speedpart, Accura Xtreme Black complements existing SLA materials such as Accura Xtreme Grey and Accura ClearVue. The goal is to combine the mechanical performance of the grey variant with a realistic black appearance while at the same time offering a cost-effective alternative to CNC-machined thermoplastics such as ABS. The relatively low viscosity of the resin supports a clean process and sharp edges. For development environments where reproducible results and short iteration cycles are required, the material can therefore be an interesting option for prototyping and small-series production.