PostPro vapor smoothing community

The PostPro community.

Practical guides from the AMT team on preparing parts, materials, machines and finishing. And a forum where the people who run PostPro systems ask, answer and show their parts.

Join the community (opens the community forum in a new tab) Read the guides

Free to joinAMT staff post as “AMT Team”Machine down? Contact support

Start here

Six guides to read first.

Each guide is written by the AMT team from AMT’s published product pages, whitepapers and case studies, and lists its sources at the end. Where a setting depends on your parts, it says so: your AMT application engineer sets the process recipe.

GalleryShow your parts AMT gallery: before and after vapor smoothing Here are four pairs from AMT’s own published images. Each pair shows the same part as printed (left) and after PostPro vapor smoothing (right).
GuideMaterials

PostPro Pure, FA326 or FA9202: which consumable for which material?

AMT makes three vapor smoothing consumables. Which one you use decides which materials you can run, and on which machines. This summary follows AMT’s consumables page.
FAQDesign for vapor smoothing

Will vapor smoothing change my part’s dimensions?

A little, and AMT has measured how much.
GuideDesign for vapor smoothing

Designing internal channels for vapor smoothing

Internal channels are one of the best reasons to vapor smooth. The process seals internal surfaces as well as external ones: the SF2X page says it “also seals internal cavities”. AMT’s systems run under vacuum, which lets the vapor travel into hard-to-reach areas of the part.
FAQMachines

SF50 or SF100? The same machine with two chamber sizes

We get this question a lot. The short answer: the PostPro SF50 and SF100 are the same machine. The difference is the chamber. The SF50 page describes it as having the same benefits as the SF100, with a more compact processing chamber for smaller production runs and prototyping.
GuideRacking & hanging

How part orientation and fixturing affect results

AMT’s vapor smoothing systems run under vacuum, which, in AMT’s words, allows the vapor “to travel freely, condense on hard-to-reach areas of the part, and smooth them evenly”. That is why complex parts and lattices smooth well. How you hold the part still matters, for a few simple reasons.

Guide library

Every guide, by forum category.

Grouped the way the forum is organized, so a follow-up question has an obvious home. Short reads, with a table wherever AMT publishes the numbers.

Start here
The fastest route to AMT for anything urgent, and the words you will meet in these guides.
2 guides
- How to get help fast: support, orders, quotes and the forumGuide · 1 min
- Vapor smoothing glossary: the words you will see in the guidesFAQ · 3 min
Tips & tricks
Practical know-how for better vapor smoothed parts: preparing parts, racking, design and what comes after smoothing.
8 guides
Preparing parts
- Before your first cycle: which printer technologies can be vapor smoothed?FAQ · 1 min
Racking & hanging
- How part orientation and fixturing affect resultsGuide · 1 min
- Know your chamber: sizes and cycle times across the SF rangeFAQ · 1 min
Design for vapor smoothing
Post-smoothing
- Cleaning and handling smoothed partsGuide · 1 min
- What “sealed” means: water resistance and porosityGuide · 1 min
Materials
What smooths, and with which consumable: polyamides, elastomers, polypropylene and more.
6 guides
Machines
Owning and running PostPro systems: SFX, SF2X, SF50, SF100 and automated loading with DMS.
6 guides
Show your parts
Before and after photos of your vapor smoothed parts. Tell us the material, the printer and the machine.
1 guide
- AMT gallery: before and after vapor smoothingGallery · 1 min
Announcements
Programs and news from the AMT team.
1 guide
- Test your parts: AMT’s free benchmark programGuide · 1 min

Tests and how-tos

Try it, test it

Nothing loads from YouTube until you press play.

Watch on YouTube:

FootageNov 8, 2024Length 1:10

Better Surface Bonding With Selective Vapor Smoothing

How to keep an area rough for bonding: mask it with tape before vapor smoothing, then peel the tape off after the cycle.
Watch on YouTube (opens in a new tab)
Watch on YouTube:

FootageDec 11, 2024Length 0:48

Can Vapor Smoothing Protect Against Stains?

Raw and vapor smoothed PA2200 SLS parts against colored juices: the raw part stains, the sealed part wipes clean.
Watch on YouTube (opens in a new tab)
Watch on YouTube:

FootageJun 13, 2025Length 0:57

Vapor Smoothing vs. Raw 3D Prints | Underwater Durability Test

A printed freediving camera frame, raw and vapor smoothed, taken into the sea: the sealed part sheds water, the raw part soaks it up.
Watch on YouTube (opens in a new tab)
Watch on YouTube:

FootageDec 6, 2024Length 0:52

Are Vapor Smoothed 3D Parts Stronger?

A drop test with Formlabs PA11 SLS parts: the raw part breaks, the vapor smoothed part stays intact.
Watch on YouTube (opens in a new tab)

How the forum works

Share what you learned. Keep it useful.

Give context
Say which material, which printer technology and which machine you used. A photo helps more than a paragraph.
Show what is yours to show
Post parts you have the right to show. Crop or blur anything that belongs to a customer, and never post someone else’s drawings or data.
Faults go to support
A machine that is down or showing a fault is a support case, not a forum thread. AMT support gets you running faster.
Recipes stay with AMT
Process recipes are set by AMT application engineers for your parts. Share results and experience, and ask AMT before changing how your machine runs.

AMT staff and application engineers moderate the forum. Posts signed “AMT Team” are written by AMT and link the published source behind every number.

Conversation startersFrom the AMT team

Open questions for the people who run the machines

Racking & hangingShare your best racking setup for TPU lattices (opens the community forum in a new tab)
Design for vapor smoothingSmall features, text and sharp edges: test before you commit (opens the community forum in a new tab)
Design for vapor smoothingThin walls and lattices: what to check (opens the community forum in a new tab)
Post-smoothingDyeing and vapor smoothing: which comes first? (opens the community forum in a new tab)
Post-smoothingPainting, coating and bonding smoothed parts: share your experience (opens the community forum in a new tab)
Post-smoothingHow do you check smoothed parts? Share your QA routine (opens the community forum in a new tab)
Show your partsShow us your parts: how to share a great before and after (opens the community forum in a new tab)
Ideas & feedbackWhat would make this community more useful to you? (opens the community forum in a new tab)

Answer on the forum (opens the community forum in a new tab)

Applications

From the case studies

Published AMT stories, by industry. Read the story, then bring your questions about the application to the forum.

Case studyMedical

Point Designs, partial hand prostheses smoothed on a PostPro SFX

Discuss (opens the community forum in a new tab)
Case studyAutomotive

GM spoiler closeout seals, 60,000 vapor smoothed TPU parts

Discuss (opens the community forum in a new tab)
Case studyAutomotive

ABConcept rally parts through the Rallye du Maroc

Discuss (opens the community forum in a new tab)
SpotlightConsumer

ZiggZagg on tailoring gloss, friction and sealing

Discuss (opens the community forum in a new tab)
Case studyIndustrial

Norden replaces a machined assembly with one smoothed part

Discuss (opens the community forum in a new tab)
Case studyIndustrial

Protolabs, flame-retardant parts with UL94 V-0 compliance

Discuss (opens the community forum in a new tab)
Case studyIndustrial

Intelligent Energy, hydrogen UAV casings smoothed on a PostPro SF100

Discuss (opens the community forum in a new tab)
NewsIndustrial

FABULOUS and AMT: food-contact validation for DETECT PA11 with PostPro Pure

Discuss (opens the community forum in a new tab)

Join

Ask, answer, show your parts.

The AMT PostPro Community is free to join. Sign up with your email address, introduce yourself, and bring your before and after photos.

Join the community (opens the community forum in a new tab) Community guidelines (opens the community forum in a new tab)

Next step

See the price. Run the numbers. Hold the part.

List prices are public and the cost-per-part math is yours to check, with no email needed for either. The free benchmark puts your own parts, vapor smoothed, in your hands.

01Quote

Build your quote

Pick a system and its options and get an itemized total on screen, from AMT’s published list prices.

Build your quote
02ROI

Calculate your ROI

Compare your cost per part with manual finishing, using your own labor rate and volumes. Every assumption is editable.

Calculate ROI
03Benchmark

Test your parts, free

Ship us your parts with a prepaid label. We vapor smooth them and send them back with before-and-after photos and a benchmark report.

Test your parts, free

No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks¹

Prices: AMT list prices, excluding tax and shipping; confirmed in your formal quote.

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