AMT PostPro SF2X complete Vapour Smoothing Machine for 3D Printing

The AMT PostPro SF2X is a bench-top vapor smoothing system engineered for production-volume post-processing of polymer 3D-printed parts, offering a 24.4 L process chamber (250 × 390 × 250 mm), cross-technology compatibility spanning MJF, SLS, HSS, SAF, and FDM, and AMT's patented PostPro Pure biodegradable solvent — an eight-year-refined chemistry platform validated on more than 30 million processed parts.

The isometric view below shows the SF2X with its processing chamber door open, revealing the brushed-steel interior with adjustable processing rack positions and the teal-accented touchscreen control panel positioned at operator height on the front face.

Double the Capacity. The Same Proven Performance.

The SF2X is the direct scale-up of AMT's PostPro SFX — the system that established the benchtop vapor smoothing category for professional additive manufacturing workflows. Where the SFX served single-shift production environments, the SF2X answers the throughput demands of workshops running two or more SLS or MJF printers simultaneously. The engineering response was precise: maintain the SFX's external footprint and proven process chemistry, then double the internal chamber volume.

At 24.4 L, the SF2X can accommodate a complete build volume of industrial SLS or HP MJF parts in a single batch. That eliminates the scheduling overhead of splitting print builds across multiple processing runs. What previously required two SFX cycles completes in one SF2X cycle — halving operator time per kilogram of finished, smoothed parts. The video below provides a system-level overview of the PostPro SF2X: loading workflow, cycle management via the touchscreen interface, and the surface quality transformation achieved on representative polymer geometries.

The front profile of the SF2X, shown below in closed-door operating position, illustrates the sealed enclosure that forms the engineering basis for the system's safe-operation certification. No solvent vapour escapes into the workspace during processing — the SF2X operates as a true closed-loop chemical system, allowing installation in standard laboratory and production environments without dedicated extraction infrastructure.

PostPro Pure — Green Chemistry That Earns Its Certifications

Most vapor smoothing solvents carry significant regulatory complexity. PostPro Pure is different. It is a readily biodegradable solvent classified under OECD Guideline 301B, with confirmed non-toxicity to aquatic invertebrates (OECD 202) and freshwater algae and cyanobacteria (OECD 201), and classified as non-sensitizing to human skin under EC No. 1272/2008. Parts vapor-smoothed using AMT systems — tested on HP MJF PA12, SLS PA2200, and multiple TPU grades — passed cytotoxicity assessment per ISO 10993-5:2009, 10993-1:2010, and 10993-12:2012 with no cytotoxic effect confirmed.

For regulated end-use sectors, the compliance framework is equally strong. PostPro Pure is listed in the FDA-approved database and carries food contact authorisation under EU regulations 1935/2004, EU 10/2011, and EG 2023/2006. Full REACH (EC 1907/2006) and RoHS (2011/65/EU, amendment 2015/863) registration is current. FMVSS302 flammability compliance is confirmed on MJF PA12 processed parts.

This compliance framework is operationalised through AMT's proprietary safe-pour cartridge system. PostPro Pure arrives pre-measured in non-hazardous packaging; the machine's automated dosing sequence handles delivery, so operators have no direct solvent contact and face no hazardous waste disposal requirements.

Before and After: What Vapor Smoothing Does to a 3D-Printed Surface

Surface transformation is the concrete outcome of every SF2X cycle. The comparison below uses a TPU bellows component — a demanding test geometry with deep convex cavities and thin wall sections that reveals whether a smoothing process penetrates internal structure or merely treats the outer surface. In the image below, the part emerges from the SLS or MJF printer with a coarse, granular grey surface, open porosity, and visible layer stratification — a typical powder-bed fusion result that blocks airtight and watertight functional performance.

After a single PostPro SF2X processing cycle, the transformation is structural rather than merely cosmetic. The polymer surface reflows under controlled solvent vapour exposure: open pores seal, layer lines dissolve, and surface Ra drops from a typical 15–20 µm as-printed to below 2 µm. The deeper black coloration reflects the solvent's chemical interaction with the polymer matrix. Critically, internal cavities seal alongside the external surface — enabling the processed part to pass water immersion tests, pressure-cycling, and ISO 10993 biocompatibility assays that the raw printed part would fail entirely.

From Workshop to Production Line

The SF2X is designed as a production tool that integrates into an additive manufacturing workflow rather than sitting as an isolated post-processing island. Its compact 450 × 500 × 845 mm footprint occupies a standard workbench position directly downstream of the depowdering station. The workshop image below positions the SF2X in a realistic production environment: at workbench height, surrounded by 3D-printed components at various stages, connecting printer output directly into the finishing flow.

Material Compatibility Across the Polymer Spectrum

Vapor smoothing effectiveness depends entirely on chemical affinity between solvent and polymer. PostPro Pure is validated for the five material families that account for the overwhelming majority of industrial SLS, MJF, and FDM production output: PA12 (HP Jet Fusion and EOS SLS grades), PA11 (bio-based nylon for flexible and impact-resistant applications), TPU (including Lubrizol M95, Quadrathane 80A, and Quadrathane 95A elastomer grades), ULTEM (high-temperature thermoplastic for aerospace and industrial-grade components), and ONYX (Markforged chopped carbon fibre composite for structural applications). If your production output uses any of these materials, the SF2X has a validated processing protocol.

AMT Patents and Process Repeatability

The SF2X's vapor smoothing process operates under AMT patents EP3565712, GB2582225, and GB2597240B. The temperature control sequence, solvent delivery profile, and post-cycle evacuation protocol embedded in these patents represent eight years of process refinement across more than 30 million parts. For end users, this directly translates into batch-to-batch repeatability: the same part geometry, processed in the same rack position, produces the same surface finish result across every production cycle.

What's in the Box

• 1 × AMT PostPro SF2X vapor smoothing system
• 6 × Processing Racks
• 1 × Storage Stand
• 1 × Preparation Stand
• 3 × FA5802 PostPro Pure cartridges
• 6 × Air Filters

Why Choose EXPERT3D?

EXPERT3D has specialised in advanced 3D technology and additive manufacturing solutions since 2012 — more than a decade of hands-on experience selecting, deploying, and supporting professional-grade systems across research institutions, universities, and industrial production teams across Spain and Europe. We provide pre-sales technical consultation covering installation requirements, power infrastructure, and consumable management planning, delivery coordination across Spain and Europe, and post-sale support backed by direct manufacturer contacts. The AMT PostPro SF2X is a precision chemical processing system: our team can guide you through integration into your existing post-processing workflow, material compatibility validation, and cycle parameter optimisation for your specific part geometries. Contact us to discuss your application requirements and current availability.