Respirator Face Mask V3 with DIY injection molded silicone seal and 3M filter

Подписаться 34 тыс.

Просмотров 8 тыс.

50% 1

Sorry for the delay on this video! I would have liked to make it months ago but I didn’t have the equipment to make it all happen. Now that I do, I hope that you all enjoy it! If you have any questions, comments, or concerns do let me know in the comments. Thank you all for your support of this channel.
This mask build is a bit more complex than my previous 2 videos. Although it may be possible to use an FDM printer for this project I recommend using a 3D resin printer. In order for the mold to function properly the surface needs to be VERY smooth. Also, none of the parts are designed to print flat on a print bed, everything requires supports.
IMPORTANT: This mask has not been evaluated by an independent testing laboratory. I can make no claims as to its safe or reliable function. If you make one and wear it, you will be doing so at your own risk! The filter used in this design is a 3M brand filter. 3M corporation in no way endorses this product! I do not claim that this 3M filter retains it’s N95 particulate filtration while in use in this device.
TOOLS AND MATERIALS:
Filter: 3M 5n11
Resin Printer (possibly any will do? I used a Form 3)
3D printing Resin (use something that is skin safe if you can find it, I used Formlabs Clear V4)
Large Syringe (I used a Medline 60mL Flat Top Syringe)
Vacuum Degasser (Any will work)
Silicone (Use something that is skin safe, I used Ecoflex 00-30 and Sortaclear 18 from Smoothon)
¼” Braided Elastic for the strap (Any brand will work)
Hot Glue, plastic cups, stir sticks and paper towels are also a must.
To join the mask plastic and silicone I used Sil Poxy and J-B WELD Clearweld Clear Epoxy Adhesive. Se below for application method.
PART FILES (Print at your own risk)
www.thingiverse.com/thing:462...
Joining the plastic and silicone:
1) Glue the mask rubber into the plastic component using J-B WELD Clearweld Clear Epoxy Adhesive
2) Pull the rubber off after the epoxy has cured. The epoxy does not bond with the silicone.
3) Apply Smooth-on Sil Poxy to the mask as shown in the video. Then reapply the mask rubber to the plastic component.
I tried 16 different glue combinations. None of the glues bonded directly to the silicone. The Epoxy does not bond to the rubber. The Sil Poxy does not bond with the plastic. However the Sil Poxy does bond permanently with this specific Epoxy. This combination was the only one that was even slightly effective.
I'm now on Patreon!!! The reward levels are very basic for the time being but I promise to bring merch and other perks in the near future.
/ the3dhandyman

Хобби

Опубликовано:

16 окт 2020

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 117

@kramerdesign9443 3 года назад

I can’t believe this channel only has 7k subs! Really cool and well presented.

@The3DHandyman 3 года назад

Thanks for watching, Philip! Building a channel is a slow process...

@pavellelyukh5272 3 года назад

@@The3DHandyman I'm working a diy version of a uvc uva rapid air sterilization mask attachment which is already patented by company selling it for $120. Is the version you make of the mask cheaper than buying the $30 industrial version? dont-get-vaporized.myshopify.com/ Is the patented product I wanna cut number of LEDs used by 50% to 66% using FEP UV transparent film and aluminum foil for reflecting the UV.

@do_not_want_to 3 года назад

For a lightweight secure attachment, you only need to look at how fabric and/or leather goods are attached to hard components. Have appropriately spaced holes on the hard component, which you can then use to sew the soft component onto the hard component. Then, normally, resin or some other sealer can be used to seal the joint, but in this case, I expect that you could use the silicon adhesive you were using as the sealing material.

@The3DHandyman 3 года назад

Thanks for your thoughts! I will keep this in mind.

@238chase 2 года назад

Maybe a design improvement you could add is instead of having the 3M filter held in place by using a clip that sits inside the FilterInterface, why not rather have it sit outside. That way you could do possible overmolding (increasing surface area for the adhesive) making for a stronger bond with the silicone rubber part and the FilterInterface? This looks like a super awesome design and would love to get this made, normal masks just mist up my glasses too much and this looks really promising. The slim design just adds the cherry on top to the overall look and feel of the design.😁

@The3DHandyman 2 года назад

Thanks for the ideas! This design in particular seems to work well for me but it has a hard time fitting a wide range of faces (despite how flexible it is). There was almost a production version after this design that remedied these issues but the funding for it fell through, unfortunately

@238chase 2 года назад

@@The3DHandyman ah shucks sorry man, that must have been tough. You have done great work, so hopefully keeping that up will mean it just becomes a matter of time for the funding to come through. Where could the subscribers and interested contributors go to show support? Hope that we get to see this v4 soon, the differences from v1 to v2 were huge, v2 to v3 didn’t let down so I am sure v4 will be worth it.

@The3DHandyman 2 года назад

@@238chase V4 will hopefully see the light of day at some point! I very much like the design and I bet you will too. The best way to keep this channel going is to support the Kickstarter that will in a round about way make or break this channel. It ends in a few days and is currently a little short of it's goal. www.kickstarter.com/projects/cruciblecompany/the-mycoseries If the product is not your style, you can still make a donation with "pledge without a reward". If the project doesn't reach the goal, you wont be charged.

@stonechops 3 года назад

I know this is all in easy to understand language but I am lost but curious of this 3D printing world! Perhaps you’ve introduced me to invest in 3D printing!

@The3DHandyman 3 года назад

Happy to hear that! The possibilities are not exactly limitless but there is a lot of very unique things that can be accomplished with this sort of tech. I will be showing lots more unique use cases in future videos. Stay tuned!

@mainstay. 3 года назад

Back at the begining of this damn pandemic I came across your channel an immediatly realised you were serious about making a mask that was safe and usable. I also thought that the box of 3M filters that I had for my respirator would be ideal but no designer had come up with anything to use them. I ended up making a cast mask that the folks over at 'Smooth-On' designed, also using Ecoflex 00-35 for the seal. I like it but yours has more air flow ( which I think is the main reason most people don't want to use a mask - I can wear my 3M respirator with the two side filters for 12hrs at work with no problem of air flow in or out) I think yours is the best compromise between a full respirator ( which I also have a small 3D printed cap at the front to put a filter in to filter the exhaled air) and is the best one I have seen yet. I also like cast masks in silicone as they can be sterilised completely with heat or washing thoroughly with no adverse effect on the mask. Plus Ecoflex 00-35 and it's variations is capable of going into an autoclave. Again well done and thanks for not letting this important issue ( wearing a good mask - not just a piece of cotton wrap) be forgotten.

@The3DHandyman 3 года назад

Thank you! I thought the same thing. The box of 5n11 filters that I bought a few weeks ago was produced in April. Clearly no one is using them for this purpose. I think the use of Ecoflex for the seal is a great idea. It's very soft and pliable and works well in the way that Smooth-on used it in their video. When I tried to use the 00-30 it as a structural element on my mask it just wasn't strong enough. Maybe the 00-35 would be more resilient. This particular mask isn't able to be autoclaved due to the printed components having a much lower deformation temperature than boiling point. If I come up with any updated designs, I will be sure to post them here. Thanks again for watching!

@181charlie 3 года назад

Super well done, dude! Thank you for taking the time to design and produce. Prusa came out with and SLA printer not too long ago.

@The3DHandyman 3 года назад

Thanks for watching! It really wasn't too bad of a process. Learning enough to actually make it successfully took the most time out of any of it. There are several of SLA machines out there at this point with good specs. What I wanted to do was test out the "best in class" for a year and then try out a cheaper unit some time from now. I'll do a comparison video at some point. Until then I'm experimenting with all the engineering materials Formlabs has to offer. Fun stuff!

@kousueki7024 2 года назад

here some of idea to make design more compact 1) fold the filter into a wavy zigzag design for the 3m filter just like car filter so the space usage will be reduce but not the filter area 2) use 2 filter instead of 1 because 3m already calculated the amount of filter area needed for the human lung to operate when it doing a heavy work(this explain why you get tired and fatigue when using single 3m filter) 3)if you could add 1way airflow exhaust, that will greatly reduce moisture in the breath area(consider it as optional because the mask will be more complicated to design) 4) the inner frame of filter should be embedded with silicone together during mold cast because you can get rid of the gluing step we hoping you can keep improving your design for your next version so the world can keep appreciate with your contribution.

@The3DHandyman 2 года назад

Thanks for the feedback! I have a 4th version of this mask that was designed but never got prototyped. It incorporates a lot of the features you mentioned. Maybe one day I can get around to making one. Time will tell Stay safe out there my friend!

@ArpanMukhopadhyay93 2 года назад

@@The3DHandyman nice! I am also making a mask Your videos are very helpful!!

@shaneintegra 2 года назад

You did an amazing job!

@maurolimaok Год назад

Preparing for SHTF... Love the video.

@The3DHandyman Год назад

Hopefully next time they still have all the mask production capacity they put together for the last time. Hopefully...

@JohnRobertson22 3 года назад

A pressure pot causes the air molecules to expand which is why the seemed to appear from nowhere.

@The3DHandyman 3 года назад

As I understand it from the videos that I watched about the process the pressure pot is supposed to crush the air bubbles down to a smaller size. However the extra pressure may have just forced air out of the gaps in my mold and into the silicone in the first place. Regardless, I have a lot to learn...

@a.schluchter2772 3 года назад

Looking good! I'm printing out the parts now on my resin printer. I'm planning to make the first one exactly to your specs but with dragonskin silicone, then after evaluation and testing, incorporate it into my current design, along with some modifications to fix that plastic-silicone interface. Then reprint & recast with a silicone of more finely tuned firmness.

@The3DHandyman 3 года назад

Looking forward to hearing the results!

@niaimack 3 года назад

Add hoops and hooks to the resin part to give the glue something to flow around and in to.

@The3DHandyman 3 года назад

I like it. What I really want to do is use the hoops with overmolding. The warp on the printed parts really complicates that process, unfortunately.

@The3DHandyman 3 года назад

Although this may not be a perfect solution by any means, I am able to permanently join the 2 parts using this method: 1) Glue the mask rubber into the plastic component using J-B WELD Clearweld Clear Epoxy Adhesive 2) Pull the rubber off after the epoxy has cured. The epoxy does not bond with the silicone. 3) Apply Smooth-on Sil Poxy to the mask as shown in the video. Then reapply the mask rubber to the plastic component. I tried 16 different glue combinations. None of the glues bonded directly to the silicone. The Epoxy does not bond to the rubber. The Sil Poxy does not bond with the plastic. However the Sil Poxy does bond permanently with this specific Epoxy. This combination was the only one that was even slightly effective.

@victoriage 3 года назад

@@The3DHandyman Such thorough testing! i just found your channel. very exciting stuff :D

@The3DHandyman 3 года назад

Thanks Victor! I do what I can.

@breezelast 3 года назад

Another awesome video, love these

@The3DHandyman 3 года назад

Glad you are enjoying the content. The videos are time consuming to put together so there wont be out frequently, but they will be out!

@nefariousyawn 3 года назад

I disabled the beep on my toaster oven by opening it up and cutting the little piezoelectric beeper. I highly recommend doing so. I did the same on my microwave oven.

@The3DHandyman 3 года назад

Haha. Very brute force! I like it

@arvindseewoosungkur9061 3 года назад

Keep up the great work .

@The3DHandyman 3 года назад

Thanks, will do!

@JC34258 3 года назад

6:04 When pouring out of a container with an offset neck like that, hold the container with the neck offset _up_ instead of down. This allows the container to tilt farther before fluid escapes, making the spout closer to horizontal, and reducing both the tendency to glug and the tendency for surface tension to drag the fluid along the outside of the container. This video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vxnDvtuKZZE.html might be for engine oil, but the same physics apply to any bottle with an offset spout.

@The3DHandyman 3 года назад

Thanks Joe. Good note! I got used to this while doing oil changes. The glug that you get with a 5L jug can make quite a mess! The surface tension on this smooth-on stuff causes it to immediately wet the surface of the bottle. I made a few of these and found the fastest, cleanest, and most accurate way to dispense it was with a 10ml/cc syringe.

@ponakka 3 года назад

This is nice and all, but i think just making a stl and printing the silicone part from tpu would benefit 100% more of other viewers. Most don't have formlabs printers home nor, vacuum machines.

@The3DHandyman 3 года назад

Very true! The rubber portion of the mask is available as an STL on the thingiverse page.

@ponakka 3 года назад

@@The3DHandyman This is very exciting news. I think i have to test this. I mean it is great thing to have makeshift masks just to be sure that there is at least some mask when needed. There should be also resmed cpap masks as a diy project, unfortunately i'm not able to model those yet, but it is legalized robbery what they ask for the resmed F20 face mask part.

@The3DHandyman 3 года назад

@@ponakka You may need to use blender or a similar program to morph the shape of the part into something that fits your face well. This design seals well on a very tight range of face shapes

@jacobrollins37 3 года назад

The mask looks really good.

@The3DHandyman 3 года назад

Thanks Jacob! This one was designed in a way that it could be injection molded. I'm trying to brush up on my prototyping for mass production lately.

@MoneoAtreides77 2 года назад

It might be worthwhile dissecting / reverse engineering a scuba mask. They typically use silicone and a mechanical seal for the lens component. Also with this design and others I have seen I wonder about the seal between the filter and the plastic surface. This seems like a point of failure / leakage. What about a thin bead of 100% silicone applied directly around the perimeter of the filter to create a compression seal?

@The3DHandyman 2 года назад

It's true, this the seal is less than ideal. This mask also doesn't seem to fit people as well as the previous 2 versions despite the seemingly better rubber seal. In order to improve on this design a lot of manufacturing challenges come into play and in a DIY setting I have not figured out the answer to these issues.

@markifi 3 года назад

chinese kn95 masks are cheap now, but it's still interesting to see you iterating this. this is your nicest design yet

@The3DHandyman 3 года назад

For sure. I hadn't actually planned on making this video at all but it felt like a good way to crack into more complex mold making. There are a few projects in the works that require cast parts and I have zero experience with this sort of thing. It was a good way to feel out the process and materials. Also, I want to put the Form 3 through its paces and see what it's capable of. I will do a video on my experience with that the printer at some point... it's hardly perfect. Happy to hear you like the design!

@ikheealtaa8694 3 года назад

use a glue called 401 buy the ones with blue box and blue cap

@The3DHandyman 3 года назад

Awesome. Thanks for the info!

@syderaz 3 года назад

2020 is fun and innovative year ever... 😷

@The3DHandyman 3 года назад

Never thought I would have done anything like this... now I've done it 3 times!

@user-ks9xk5fb6y 11 месяцев назад

Great job ! What CAD software did you use to design the mask?

@The3DHandyman 11 месяцев назад

Thanks! I worked with a friend who is a Solidworks pro on this version of the device.

@omaryaccob2975 2 года назад

i need this

@martinvaxjo 3 года назад

I suggest you make the soft sealing as an equally thick snap-in into a groove and keep the rest hard. Then glue is not needed except to glue the sealing together.

@The3DHandyman 3 года назад

Thanks for the thought! I will keep that in mind.

@martinvaxjo 3 года назад

@@The3DHandyman Cool I must say you have inspired me. I have some more ideas of huge improvement, and that is to make a bit thicker cartridge, about 2 cm, with multi-folded filter, glue it into the cartridge, just like the folded filter you bought. In this way you will increase the filter surface area, increasing breathability. Another cool thing would be an exhaust valve that can be turned on and off, depending on the environment you are in. A bicycle helmet with a tight plexivisor might also be a great protection, especial for medical staff working with coughing patients or anyone who want to be more protected. The air you breath must first pass the filter, then flow inside the visor to defog it, then into mouth and nose through valves. Might look bit like Darth Vader in the Star Wars, I know, but I guess these solutions could be made in a bit more rebellious design than black? In some countries a bicysle helmet might also need a rain cover in front of the filter. I do not have a 3D-printer and no experience of your 3D-programs but I am an experienced mechanical engineer willing to learn. Until then I will try to build in other ways. My ideas are a free gift to you. You deserve it. Stay awesome!

@The3DHandyman 3 года назад

@@martinvaxjo Thanks Martin! I like your ideas. The pleated filter is one that I have thought a fair amount about. I attempted to make a filter holder that forced the filter into that shape but there were mechanical issues with the process. Still working on that one... The on/off out valve is also pretty cool concept, hadn't thought of that! Will have to give that some thought. Thanks for your thoughts on the subject!

@martinvaxjo 3 года назад

@@The3DHandyman The hepa-filter should be folded in advance and glued into a box or in place, just like the big one you bought is glued into the box. I prefer a straight box, but it can of course be curved in the lateral plane down under the chin too.

@The3DHandyman 3 года назад

@@martinvaxjo Got yah. I had been thinking about using KN95 type material for the pleats. The HVAC filter material would likely be more robust.

@Foxxxxx96 3 года назад

you can print that with the Elastic 50A

@The3DHandyman 3 года назад

Very true! I thought about it but I don't have many things to print in that material at the moment. I'm more focused on the other engineering resins like Tough 2000. Lots in the works!

@Foxxxxx96 3 года назад

@@The3DHandyman Infinite possibilities on what we can make. Great video though keep it up!

@paultan5065 2 года назад

you piqued my interest in moulding, learning new things everytime I watch your vids.

@The3DHandyman 2 года назад

Glad to hear it! Thanks for the comment

@durlabhsoni3079 2 года назад

your work is very informative.....sir I am searching for material for customized static and dynamic sealing applications. Do you think Smoothon Sortaclear 18 is good for this?

@The3DHandyman 2 года назад

Thanks! It's possible. Sorta clear 18 is not extremely resilient but might hold up well in some conditions. The texture is a little sticky to the touch so it should cling to smooth surfaces easily. It's hard to say without knowing the exact application though. Often times with this sort of thing a lot of experimentation is needed to find the perfect product.

@durlabhsoni3079 2 года назад

@@The3DHandyman Thank you for reply... yes, you are right lot of experiments does require to reach perfection. my application demands 50-80 shore A ( but of course, it will be set after testing )but the material surface should be smooth as you said. I will be glad if you have any suggestions in terms of a smooth surface.

@The3DHandyman 2 года назад

@@durlabhsoni3079 I am pretty new to this field, so I don't have much to offer. Have you thought about posting on any of the Smooth-On videos? They know a lot more about their products than I do.

@mikropower01 3 года назад

Your mask looks much better than the face diapers that we currently have to wear. If I were to create such a mask, it would be with an exhalation valve. The moisture just rises too quickly in such a mask. If the filter fabric is damp, it no longer lets air through. You could either make a flutter valve or maybe something that looks like fish gills. For the coming winter I am building myself a mask with stainless steel as "filter material". This metal only serves to absorb the heat of the exhaled air and to warm up the air to be inhaled again. (has no relation to Cov2) There should be an area in which condensation can drain away. If you are on your bike quickly and the air is very cold (-15 ° C), your lungs really freeze. The -15 ° C in Germany should not be underestimated because it is humid, cold air. This air draws the heat out of the body very efficiently. Even Russians (a fellow student of mine) who were used to -60 ° C dry cold were not prepared for the rapid loss of heat.

@syrew900 3 года назад

Exhalation valves kind of defeat the purpose dont they?

@mikropower01 3 года назад

@_ David _ - Why? If you are sick and the other people are wearing a mask, then they do not get a problem. My N95 Mask (with exhalation valve) is very tight at my face, over the nose and mouth. The problem is: The other people can not breath with this thin paper (non N95 Masks) because they are very fast wet. This leads to the main-problem: They are wearing this masks as "Chin diapers" or they do NOT cover their nose! You have do do it in a way so that it works without any problems. If the product is trash or not useable in the supposed way, then the product is useless. This thin paper-masks are often open to the sides. The best would be a Mask with a exhalation-valve which points to the ground. If the airflow goes down (not to the sides), then the momentum of the air is going downwards. If you sneeze in a papermask, the air is not going trough the filter-material! The air will go to all sides and the particles will be blown all over the place. I have seen this, it works like the muzzle brake of our self-propelled howitzer M109. You can feel a air blast to the sides.

@mikropower01 3 года назад

@@syrew900 - If i see the people here, then they can not use the masks for a long time if the do not have a exhalation valve. The result is, that they pull the mask to the side, you can see the nose or the mask is under the chin. :-( 90% of the people do not wear the mask in the right way, because they have problems to breath with the mask. This is logical, because you can not breath so good trough a wet cloth rag. This means that 90% of the people walking around unprotected. They use some type of trick to let more Air to their lungs. They cheat.

@syrew900 3 года назад

@@mikropower01 i wear a standard paper surgical mask for 12 hours a day. It does not become wet.

@mikropower01 3 года назад

@@syrew900 - Then you should make a test. Blow in you mask and see where the wind goes. Or put a candle in front of you and try to blow to the flame. If you blow in the direction and the flame is flickering, then your mask is not protective. Check out the sides of the mask. if the air can go trough the sides, then you have no real protection. I wearing my N95 mask ans after 30 minutes in the market here my face is totally wet. It is not so easy to breath. Without this vent it would be impossible for over 10 minutes to breath in a normal way. I think your mask is not tight to your face, so you can work hours without any problem ... you are cheating or your mask is a low quality mask. if you can breth easy trough your mask for hours, it is basically useless and a placebo. We have here temperatures from 3°C till 14°C over the day and if you breath trough the mask, then she will be wet after a short time. It is impossible to prevent this. In summer we did not had this problem. With my full-mask (with eye-protection) there is not such a problem, because there are 4 vents inside. 2x for input and 2x for output, so that the filter can not come in contact with the wet exhaled air.

@ramilkurbanov6068 3 года назад

Спасибо тебе большое!! Желаю тебе здоровья!! Я врач, работаю с больными по коронавирусу. Мне твое видео очень помогло. Обращайся , я тоже рад буду тебе помочь !!!

@The3DHandyman 3 года назад

Спасибо за добрые слова. Я рада, что помогала всем, чем могла. Здоровья Вам и Вашим!

@olivermortimer9485 Год назад

What CAD program did you use to model this?

@The3DHandyman Год назад

I worked with a Solidworks designer to make this version

@Kmakaot 3 года назад

I want you Prusa!

@bykush_5299 3 года назад

is it possible to print this with a normal 3d printer?

@The3DHandyman 3 года назад

You could try to print the rubber part in TPU. Not sure how it would turn out tho.

@willymaven1626 3 года назад

Is this resin print only? Can it be done with pla?

@The3DHandyman 3 года назад

Good question. It might be possible to do this print on a FDM printer but I haven't tried it. You would need to print all the with supports which would require a lot of cleanup/sanding/smoothing work. I think a mold release such as petroleum jelly will be necessary to prevent the silicone from sticking to the mold. A resin printer is definitely preferable for this but if you decide to give it a try on an FDM printer, let me know in the comments how it worked for you.

@jamieb78 3 года назад

I can confirm sanding is needed but still clicks together nicely. I printed them face down with a raft. I am going to try and print the flexible part in Tpu. Would make the whole process easier. What are your thoughts?

@The3DHandyman 3 года назад

@@jamieb78 I cant say for sure because I am yet to try a printing in TPU. Best of luck! If it turns out well, please feel free to upload some photos to the Thingiverse page.

@utubestalker.dotcom 3 года назад

He sounds like Spock from Star Trek

@The3DHandyman 3 года назад

I also get Tuvok a lot

@neethishkumar7152 2 года назад

wow ! how can I contact you? I am a master's student, Working on developing a silicone facemask! I need your help! can I get your contact! please

@The3DHandyman 2 года назад

Hi Neethish. Feel free to ask me any questions here. I am not very experienced in this area but I will help any way that I can!

@GnuReligion 3 года назад

Are you on a Quercetin+Zinc+D vitamin regimen? Have some Ivermectin and Hydroxychloroquine on hand to treat early infection?

@mikropower01 3 года назад

If you use Hydroxychloroquine, then do not do it like the American doctors. The amount of Hydroxychloroquine was in the USA much to high, in this high dose is is poisonous. Dr. John Campbell has made a video. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-2uzXHnUViro.html If you are sick: 200mg - 400mg daily as the maximum. More will kill you, but the US-doctors gave their patients 500% of this amount. Then they had the opinion that it will not work. XD Are American doctors are unable to rad the package insert?

@The3DHandyman 3 года назад

I'm pretty sure my breakfast cereal has the Zinc and vitamin D. Other than that I spend my time social distancing. It's been an almost party free 2020... what a year. Careful with what your taking. Try to get expert opinions whenever possible.

@GnuReligion 3 года назад

@@mikropower01 Yes, that Lancet study where they killed very sick patients with overdoes of HCQ was retracted long ago, and disowned by the 3 authors. Still, it is oft cited "evidence" that there are no good preventative measures, or treatments. Am subscribed to John Campbell! He is the most conservative YT Doctor that I watch. Try the Peak Prosperity channel too.

@GnuReligion 3 года назад

@@The3DHandyman Vit-D has to be dissolved in fat (gel caps) ... so your Milk may have it. It is certainly harmless, and even Dr. (evil) Fauci takes supplementary D. Back in March and April, when there was nary a dust mask to be found in stores, I frenetically printed several designs. Still using a PETG-TPU Montana mask, made back way back then. Heavy and uncomfortable, if used for long. You certainly took the DIY approach to the limit, with resin-printed forms, and the face-contoured gasket. Lightweight, and nice, large filter area too. I certainly admire your engineering and production skills with these videos. Nonetheless, I am ready for lockdowns and mandatory masking to be over. A chin-diaper is merely a passport to be in public. There are three other corona-viruses that we call the common cold ... and there has never been a vaccine for the common cold. Overall death rates are within norms. Covid-19 is just part of our biome now. Haven't we flattened the curve already?

@The3DHandyman 3 года назад

Thanks! I definitely tried to push myself on this one. As for the virus itself, we will see how the winter unfolds. I suppose the most important goal we could have is to keep hospitals from being flooded with patients. The treatments that exist now are certainly better than what there was months ago. Hopefully by next year some time we can add this one to the list of the other 3 common but not deadly coronaviruses. Until then, I'm going to keep laying low.

@Yoursoul101 2 года назад

Hmmm I'm surprised it wasn't built with it being used with the filter portion pulled away more from your face. I hate the masks that are right in your face.

@The3DHandyman 2 года назад

The issue with moving the filter further from the face is that the amount of air that is rebreathed increases. The smaller the cavity, the more fresh air you can take in with each breath.