How to make a veil or respirator, we wrote a practical guide. Like everyone else, our workshop was marked by a spreading virus and we were forced to close for precautionary reasons. However, we decided to at least provide some instructions and possibly help with the production of drapes.
Veil production - instructions
First of all, it must be said that the veil does not protect you 100% from the virus, but it has its preventive significance, as it partially prevents the spread of the infection (since most people have no symptoms, they can still spread the infection).
Another reason to wear a mask is that respirators are not available and the mask protects you at least partially if you use it properly.
More on why to wear a veil:
What material to use for the veil
The material needs to capture as many virus particles as possible while allowing for easy breathing.
OVERVIEW OF MATERIALS:
Veil production process
For example, we used cotton and perlan as a filling.
First we cut the fabric into a square: 20 x 20 cm and iron the edges (two strips 3.5 * 100 cm)
Iron the edges: bend the two edges twice by approx. 0.5 - 1 cm using an iron.
We insert a perlan: According to the real dimensions of the veil with ironed edges, we cut the perlan (if you cut and iron exactly, you can cut the perlan at once, I prefer to always cut the perlan to the size of a specific veil), then we insert the cut perlan inside the veil
Bend the strings for strings inwards on both sides and iron them. This can be saved by purchasing ready-made oblique strips in haberdashery.
Warehouses: we fold squares with pearl and cleaned edges into an accordion, a total of three warehouses, we don't have to worry too much about it with our faces, it will spread anyway.
We fold the prepared strips in half to find the center, and then we place and pin the folded drape into it.
We sew the cord along its entire length, which we clean and sew to the drape at the same time.
Be sure to insert the ends of the strings inside (see video below).
If you do not believe in sewing, then here are instructions for a veil without sewing .
How to use a veil
- The veil must adhere to the face and must also cover the nose. If the veil protrudes somewhere, its protection is significantly lower.
- When wearing the veil, try to touch it as little as possible. Even touches transmit viruses and bacteria, reducing your effectiveness.
- Despite careful hygiene, the veils need to be changed often, ideally after 2-3 hours. In a humid environment more often.
- It is recommended to remove the veil from the back, throw the veil into a lockable basket and then treat your hands with disinfectant or wash with soap and water.
If you have a paper veil, its use is only one-time.
For cotton drapes, it is necessary to wash it to the maximum temperature after each use and iron it on both sides.
Mask production using 3D printing
You will find a lot of freely available resources on the Internet, thanks to which you can print your own mask. Here are some resources:
Respirators - types, production
For obvious reasons, respirators are not available, so we have to make do with what we have.
Types of respirators
Respirators are classified into 3 types according to the degree of protection:
- FFP1 - Captures 80 to 90% of dust and aerosol particles, so it is not very suitable for medical use.
- FFP2 - It has an efficiency of around 95% and can handle even weaker toxic substances.
- FFP3 - Efficacy around 99%, it also captures viruses, spores and bacteria, so it is the only category of respirators that can handle the new coronavirus .
We had several FFP1 and FFP2 respirators in the workshop, which unfortunately do not protect against the virus.
Production of respirator according to the rector of CTU:
- Cut an empty 2 l PET bottle according to the drawing
- Seal the inside of the cuts with window seals for comfort.
- Pass the PET through the hole near the ears and stick it over to seal it.
- Insert the filter cartridge - at the moment many layers of paper towels - later eg nanofiber layer and desiccator
Source: Facebook CTU
Prototype of a new DIY mask
The production of a mask + filter, which every user could print on a regular 3D printer, which is planned by Jindřich Křivka from the Faculty of Electrical Engineering of the UWB, also looks promising.
The scientist is currently looking for someone to help choose the material for the mask filter.
An interesting alternative to missing respirators are nanofiber drapes, which capture up to 99% of the virus, which is more than with the FFP3 filter. They are currently working on it at the Technical University in Liberec and will distribute the first delivery to medical facilities in the Liberec Region.
Another Czech company will also produce anti-coronavirus drapes from nanofibers in Brno .
Respilon announced plans to produce special drapes in late January after a new type of coronavirus began to spread in China at the end of 2019. Ordinary drapes mainly prevent the spread of the infected virus, who put on the drape. But the nanofiber drape can also filter out viruses coming from outside, according to the company, and copper oxide nanoparticles will destroy the virus. ”
3D printing of the Respirator + filter
Veil + eye protection
Also remember to protect your eyes, as the virus is transmitted to the mucous membranes and if you have your eyes exposed, you can still become infected. It is recommended to wear goggles, or better yet overall face protection.
Video tutorial for the production of full face DIY masks:
How to protect yourself against coronavirus in general - COVID-19
- Try to limit contact with people as much as possible
- Wash your hands regularly (warm water + soap or disinfectant)
- Wear a mask or respirator, protect your eyes
- If you meet people, keep a distance of at least 2-4 m
- Restrict people to the necessary livelihoods only (food, medicine, work)