---
title: "HP MJF Parts Smoothed with PostPro Pure | AMT PostPro"
description: "Test results for HP 3D HR PA 12 parts vapor smoothed with PostPro Pure: better surface quality, no loss of strength and no cytotoxic effects."
canonical: https://amtechnologies.com/resources/whitepapers/vapor-smoothing-of-hp-multi-jet-fusion-mjf-parts-with-amts-sustainable-postpro-pureconsumable/
updated: 2026-10-06
type: whitepaper
---
Whitepaper · HP 3D High Reusability PA 12

# Vapor smoothing HP Multi Jet Fusion parts with PostPro Pure

Extensive testing evaluated vapor smoothing with PostPro Pure on parts printed in HP 3D High Reusability (HR) PA 12, developed by Evonik. PostPro vapor smoothing significantly improves surface quality while keeping mechanical performance, with no reduction in strength or durability.

[Read the whitepaper (PDF, opens in a new tab)](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Whitepapers/AMT_WP_HP_MJF_POSTPRO_PURE.pdf?ver=2) [Test your parts](https://amtechnologies.com/test-your-parts/)

Published Jun 20, 2025 Free download, no form

![Cover of the whitepaper “Vapor smoothing HP Multi Jet Fusion parts with PostPro Pure”](https://amtechnologies.com/img/resources/wp-hp-mjf-pure-720.webp)

- **With**: HP
- **Material**: HP 3D High Reusability PA 12
- **Printing**: HP Multi Jet Fusion
- **Consumable**: [PostPro Pure](https://amtechnologies.com/products/vapor-smoothing/consumables/)
- **Published**: Jun 20, 2025

- No cytotoxic effects and no loss of strength[1] HP 3D HR PA 12 · PostPro Pure

## Summary

Testing on HP 3D HR PA 12 parts shows that PostPro vapor smoothing with PostPro Pure significantly improves surface quality while maintaining mechanical performance, with no reduction in strength or durability. The processed parts also showed no cytotoxic effects.[1]

The whitepaper has the full test method and results. For the consumable, see [PostPro Pure and the other consumables](https://amtechnologies.com/products/vapor-smoothing/consumables/).

Key finding

No cytotoxic effects and no loss of strength[1]

Full whitepaper

Method, data and charts in the PDF. Free, no form to fill in.

[Download the PDF (opens in a new tab)](https://6983077.fs1.hubspotusercontent-na1.net/hubfs/6983077/Website/Whitepapers/AMT_WP_HP_MJF_POSTPRO_PURE.pdf?ver=2)

Related

- [Compatible materials lists](https://amtechnologies.com/resources/documents/)
- [What is vapor smoothing?](https://amtechnologies.com/learn/what-is-vapor-smoothing/)
- [All whitepapers](https://amtechnologies.com/resources/whitepapers/)

Test your parts

## Send us a part. See it smoothed.

We vapor smooth your own parts and send them back with the results. No cost to evaluate · Parts returned · Typical turnaround 2–3 weeks[2]

[Test your parts](https://amtechnologies.com/test-your-parts/) [See the systems](https://amtechnologies.com/products/vapor-smoothing/)

## Sources

1. [Vapor smoothing of HP MJF parts with sustainable PostPro Pure consumable (whitepaper)](https://amtechnologies.com/resources/whitepapers/vapor-smoothing-of-hp-multi-jet-fusion-mjf-parts-with-amts-sustainable-postpro-pureconsumable/) · AMT · Jun 20, 2025
2. [PostPro benchmarking: send us your 3D printed parts](https://benchmarking.amtechnologies.com/) · AMT · read Oct 6, 2026