A team of Brno University of Technology researchers and students have developed a 3D printable protection half mask that does not require a special printer or material. The product is intended as improvised personal protective equipment for non-professional use by the general public and can be easily manufactured on regular 3D equipment utilizing the FDM technology (thermoplastic modeling). Although 3D print-outs are usually difficult to seal due to their porosity, the BUT team’s concept has eliminated this problem, allowing the use of standard devices.NEW: Immediately after the release of the new version of the BUTMASK-H2 we received several requests to increase the filter area. We decided to fulfill this request, consequently a new version designated BUTMASK-H2.1 is released. The updated design provides filter area which is 50 percent larger (approx. 73 cm ^ 2). Attention! Unfortunately, not only a new filter cover needs to be printed, it is necessary to make both parts of the mask again. The assembly procedure remains the same. Of course, the original BUTMASK-H2 files will remain available for download. For more information please see the Download section.
BUTMASK-H2 - All available frame sizes
Utilizing the feedback provided by the printers‘ community and expert opinions of the initial version, we designed the BUTMask-H2, a substantially revised product with the following features:
If you consider the first model uncomfortable, do not hesitate to try on the new version.
We thank the hundreds of customers who provided their comments and reviews, enabling us to improve the product gradually. The development involved creating dozens of preliminary versions, and many user recommendations were suitably implemented.
The tests performed on BUTMASK-H1 and BUTMASK-H2 confirmed that:
After the testing, the innovated shape of the frame can be considered final; we will now focus on searching for reliable solutions and paths to take us closer to FFP2.
The mask 3D Model Files are distributed under Creative Commons licence of type BY-NC-ND.
The 3D Model Files are available for wholly or partly non-commercial purposes. Please contact us before printing the half mask in larger quantities to be commercially distributed (sold): Even though our vision is to spread the mask widely, some of the recent experiences convinced us that, unfortunately, events just cannot be left to run their course freely. Please note that the BUTMASK-H2 is an improvised protective device and large-scale production in advance of testing and formal approval(s) is not recommended.
Obviously, printing out a couple of dozens (meaning markedly less than 100 pcs) of Butmasks and selling them at prices approximately covering your costs will not be regarded as a business project.
Responsibility: Ing. Václav Kaczmarczyk, Ph.D.