@@ -15,20 +15,16 @@ layer for respirators / masks / PPE for the corona viruses.
[Wood pulp is the raw material for paper towels with the capacity of filtering particles of 0.3 μm.](https://smartairfilters.com/en/blog/paper-towel-effective-against-viruses-diy-mask/)
The corona virus measures approximately 0.1 μm. We can modify the compaction of the layers and/ or the size of the fibers to increase their filtering capacity / breathability.
## Filter + Half Face Mask
**According to our calculations the half mask will cost $0,029 and the filter will cost $0,1.**
We are also developing a face mask which filters can be exchanged,
completely out of wood pulp to be able to use our raw material.
completely out of molded wood pulp, taking advantage of our raw material.
[Our design is based on Wasp’s design](https://www.3dwasp.com/en/3d-printed-mask-from-3d-scanning/) but we are looking to work with injection molding
and/or 2 mold processes instead of 3D printing.
It is crucial to be able to mass produce the masks.
The advantage of Wasp design is that the filters are held on the inside side of the mask.
We think that this detail would help decrease the contamination of the filters when changing them.
It is crucial to be able to mass produce the half masks.
The advantage of Wasp design is that the filters are held on the inside side of the mask, decreasing the contamination of the filters when changing them.
There are also fabric masks in which these filters could work [like this one, the HKMask](https://diymask.site/).
## Filter + Half Face Mask
For the filter we also need a half face mask. We are working in a version made from wood pulp instead of 3D printing to be mass produced with compression molds similar to egg boxes.
The filter frame is still 3D printed. Our next step is to Incorporate it in the mold and make it with wood pulp.
**According to our calculations the half mask will cost $0,029 and the filter will cost $0,1.**
## Filter Key Parameters to measure [[2](https://scientificfilters.com/wp-content/uploads/2016/03/BasicFiltrationConcepts.pdf)]
- Scanning Electron Microscope [SEM](https://en.wikipedia.org/wiki/Scanning_electron_microscope): This tests characterize the materials porosity. Target: < 0.1 um.
