[updates:

• Successfully tested by Matt Barinholtz with Eva foam inner shell and HIPS outer shell
• added draft angle for easier removal from the mold.
• added extrusion for easier filter holes cutting
  ]

(mostly) vacuum formed FP2 mask

Motivations:

• faster production than 3D printing
• possibility of using a flexible material favoring the adaptation to different face shapes for sealing.
• vacuum former are easy to diy in fablabs or at home: https://www.instructables.com/id/Another-DIY-Vacuum-Former/

Inspiration:
OpenMask V4: https://www.thingiverse.com/thing:4217534?fbclid=IwAR0pxJDvh4IbgvWBtUQ-LOkHylF10ok5WuKJPCfsy14tkCZTd6JG6rXyefw

Instructions :

• 2 shells are vacuum formed on 3d printed molds.
• Holes are cut in the flat surfaces of the two shells to allow air to pass through.
• A filter is inserted between the two (now perforated) flat surfaces
• The two shells are assembled according to a method to be determined (bonding, friction, elastics on the outer shell to maintain the pressure?)
• Holes are drilled to fix two elastics which will pass behind the head.

More info, source files and instructions: https://docs.google.com/document/d/18udAtN7a6cPPwP7Y57qWewb93cckByvhFXsOtu1B500/edit#heading=h.e0tx3cvgtip6