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Supports required for the Filter Cap only.
Valve mold can be used to create silicone valve. Mix 2 parts 100% silicon to 1 part corn starch and clamp mold. Wait 1-2 hours before removing from mold.
If 3D Printing valve it is best to put a thin coating of silicone on both mask and valve to create tighter seal.
Silicone is also used on inside parameter of mask for seal to face.
Test seal by placing your hand over the Filter cap and inhaling. There should be no air leaking in through the valves or around your face.
Cut to fit MRV 16, HEPA or MPR 2200 or above for replaceable filter.
This article was first featured at https://ift.tt/3coEkHm on April 16, 2020 at 12:08PM by Chainsaw_Canuck
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