Blank OpenPrintTag HT (10 NFC Tags)

This pack of 10 blank, writable OpenPrintTags HT is for advanced makers and builders who want to start experimenting with the new open standard on their High-Temp spools right away. Unlike the regular OpenPrintTag, the OpenPrintTag HT is equipped with hardware and glue resisting temperatures up to 150 °C. This is particularly useful when drying high-temperature materials.

The OpenPrintTags are perfect for integrating into custom printer builds (like Voron), mobile apps, developing your own filament management tools, or adding your existing spools to a smart inventory.

These are blank tags that require user setup and are not a simple plug-and-play solution at this time. We are launching these first for our community of builders and tinkerers. For a simple out-of-the-box experience, we recommend our new Prusament spools, which come with pre-loaded data.

About OpenPrintTag

Ending the Wild West of Smart Spools

The OpenPrintTag standard is an open-source initiative by Prusa Research, creating a single smart spool standard that works across all brands and ecosystems. It is free to use, free to extend, and open for anyone to build upon. Most importantly, it works entirely offline. All essential data is stored directly on the tag. Your printer can recognize the spool instantly, with no dependence on cloud services or vendor lock-ins.

Offline by Design

The OpenPrintTag is writable. It’s not just a tag that holds an ID; you can write important data directly to it. All essential data – material, color, key print settings, and remaining filament – is stored on the tag. Your printer doesn’t need Wi-Fi or a cloud service to identify the spool.

Fully Open-Source

OpenPrintTag is a published standard that is completely free to use, free to extend, and works across brands. Anyone can build on it without any licensing fees. This is critical for making it the one standard that everyone can adopt.

All specifications are available at specs.openprinttag.org.

Reusable and Rewritable

This is what a smart spool was always meant to be. Your printer or a mobile app can write the exact remaining filament length back to the tag after every print. No more guesswork. When a spool is empty, peel the tag off, stick it on any filament you own, and flash it with your phone. Instantly, your old spool is smart. No vendor lock-in, no waste.

Smarter Hardware & Readability

The hardware itself is clever. The tag is a large circle, which means it can be read and written to in any orientation. You don’t have to wait for the spool to spin to a specific position. It’s powerful enough to be read through an entire 2kg (Prusament) spool, so one tag is all you need – no more complex systems with a tag on each side. The data is always in sync.

Universal Compatibility

The OpenPrintTag standard works across all brands and ecosystems. This universal standard guarantees compatibility on all supported devices, eliminating proprietary walled gardens. Designed to be used with filament spools, resin containers, and other applications.

Backed by major filament manufacturers

Every new Prusament spool we manufacture since October 2025 includes OpenPrintTag. But it’s not just us. We want this to be a universal solution, and we are already in discussion with several other major brands who are testing or have shown interest in OpenPrintTag. Over time, you will see it being used by more and more companies.

Notes

• This package contains 10 blank OpenPrintTag HT NFC Tags.
• All information about the OpenPrintTag standard can be found at the openprinttag.org website.
• All specifications are available at specs.openprinttag.org.
• The OpenPrintTag HT glued to a spool resists up to 150 °C when drying.