Mr. Portelos' STEM site

To print make these:

I used an Ender-3 Printer found here: https://amzn.to/39X2w25

I purchased plastic filament here. Make sure you get right size. Mine takes the 1.75mm https://amzn.to/2Xt2SuT

I used the free program to get ready for printer Cura 4.5 https://ultimaker.com/software/ultimaker-cura

Here are the files sent to me by Shweta Thapa at Maker Depot in New Jersey. The Covid-19 mask is broken down to 3 parts listed here separately. I have also doubled them up to print 2 masks at the same time. That file is called Double. I also shrank them a bit for children size. They are called Kid double. https://www.dropbox.com/sh/0hf8vne2wmn5l94/AAA2R5yY0AMJrhY3erzlEcTEa?dl=0

I bought a HEPA filter that I took apart and cut into squares slightly bigger than the mask square that holds it into place. Here is a link to HEPA filters that are similar to the N95 mask efficiency (block 95% of 3 micron sized particles.)

I bought these elastic braided strands that I tied at the ends. If they are a little thicker, it helps tighten the masks by simply pulling on the ends. https://amzn.to/39SoHqb

Finally, I added a neoprene strip that I reinforced with crazy glue to make a tighter and gentler fit. https://amzn.to/2JP14UF

I am not making any guarantee on these, but I, my family and medical worker friends are using them.

You can reuse, and clean inside and outside with soap water. I am not exactly sure how often you need to replace the filter yet. Some are saying take the filter out and microwave it, for 20 seconds, but I have not tried that yet. Others are saying to spray it with hand sanitizer, but let it completely dry and air out before using it.

I’m sure you’ve heard many kids, teens, and adults in your life talking about Minecraft. Here’s why that might be a good thing, and how to keep it from turning bad.