the reasoning propaganda for the masks were always bullshit, but assertions of O2 deprivation aren't accurate at all
You could literally check it by yourself for few bucks. You need a cheap electrochemical oxygen sensor, something like this https://aliexpress.com/item/1005004689458078.html and any multimeter. Sensor is a kind of battery and voltage is linearly proportional to oxygen concentration at the side of battery exposed to the environment. Measuring voltage in steady air you get calibration point for 20.9% O2 as it should be in Earth atmosphere. Remember voltage it gives. Other calibration point is 0% when sensor will give 0V output. Then, measured O2 concentration equal measured_voltage * 20.9% / open_air_voltage.
Sensor is pretty sensitive, stable, accurate and works from 0% - 100% oxygen concentration.
Then, you just measure oxygen consentration under the mask. For regular surgical blue mask it will be 18% and below, depending on breathing rate.
I had few of that sensors to measure quality of welding oxygen, engine exhaust and other things, so I successfully used that sensors to troll some maks mandate defenders among some acquaintances (not friends, have no such friends who defended that shit) since the beginnign of coronahoax. In most cases finding the truth by themselves worked out even for dumbest of them. There was one or two completely dumb, with hysterical "yes, it's lower than safe concentration, but you are not a doctor and killing grandmas!!!111" refusal, but fuck them.
Surgical mask prevents normal output air flow and oxygen depleted air stays under the mask (and around), instead of being streamed down from nostrils, in huge amounts, so on breath in you have a significant lack of oxygen in incoming air.
You could literally measure oxygen deprivation for fucking $35 and see by your own eyes what is really happening. You don't need to be a fucking doctor or rocket scientist to do it.
Why are you people so incurious? What makes you unable to even think about checking things by yourself and force you to look for some authority that you for some reason think will be believeable?
for decades there's been people in the trades having to wear masks or respirators. if masks were restricting 02, OSHA would've gotten involved.
IDK about OSHA or whatever, but in Russia, guidelines for surgeons who have to use surgical masks says that they should be changed every 40 minutes with some time between changes. Cloth masks for industry is not regulated at all, because they are not officially allowed for industrial use. Only for home/hobby use. For industrial use respirators and gas-masks licensed with valve system to separate air ins and outs so they does not mix breathed out and breathed in air. Official limit for oxygen concentration in breathing air when human could be allowed to be exposed to without additional breathing apparatus is 18%. Everything below is accounted as harmful.
Something tells me that you will find similar guidlines for US surgeons and rulings for industry. And of course you will not find anything about wearing that chineese made cloth masks for any prolonged period of time as was forced by insane WHO terrorist organisation and their accomplices rulings. You know, human beings and laws of physics are very similar on both sides of planet, so that 18% safe limit should be the same, as a way cloth masks interfere with air flows.
the reasoning propaganda for the masks were always bullshit, but assertions of O2 deprivation aren't accurate at all
You could literally check it yourself for few bucks. You need a cheap electrochemical oxygen sensor, something like this https://aliexpress.com/item/1005004689458078.html and any multimeter. Sensor is a kind of battery and voltage is linearly proportional to oxygen concentration. Measuring voltage in steady air you get calibration point for 20.9% as it should be in Earth atmosphere. Remember voltage it gives. Other calibration point is 0% when sensor will give 0V output. Then, measured O2 concentration equal measured_voltage * 20.9% / open_air_voltage.
Sensor is pretty sensitive and works from 0% - 100% oxygen concentration.
Then, you just measure oxygen consentration under the mask. For regular surgical blue mask it will be 18% and below, depending on breathing rate.
I had few of that sensors to measure quality of welding oxygen, engine exhaust and other things, so I successfully used that sensors to troll some maks mandate defenders among some acquaintances (not friends, have no such friends who defended that shit) since the beginnign of coronahoax. In most cases finding the truth by themselves worked out even for dumbest of them. There was one or two completely dumb, with hysterical "yes, it's lower than safe concentration, but you are not a doctor and killing grandmas!!!111" refusal, but fuck them.
Surgical mask prevents normal output air flow and oxygen depleted air stays under the mask (and around), instead of being streamed down from nostrils, in huge amounts, so on breath in you have a significant lack of oxygen in incoming air.
You could literally measure oxygen deprivation for fucking $35 and see by your own eyes what is really happening. You don't need to be a fucking doctor or rocket scientist to do it.
Why are you people so incurious? What makes you unable to even think about checking things by yourself and force you to look for some authority that you for some reason think will be believeable?
for decades there's been people in the trades having to wear masks or respirators. if masks were restricting 02, OSHA would've gotten involved.
IDK about OSHA or whatever, but in Russia, guidelines for surgeons who have to use surgical masks says that they should be changed every 40 minutes with some time between changes. Cloth masks for industry is not regulated at all, because they are not officially allowed for industrial use. Only for home/hobby use. For industrial use respirators and gas-masks licensed with valve system to separate air ins and outs so they does not mix breathed out and breathed in air. Official limit for oxygen concentration in breathing air when human could be allowed to be exposed to without additional breathing apparatus is 18%. Everything below is accounted as harmful.
Something tells me that you will find similar guidlines for US surgeons and rulings for industry. And of course you will not find anything about wearing that chineese made cloth masks for any prolonged period of time as was forced by insane WHO terrorist organisation and their accomplices rulings. You know, human beings and laws of physics are very similar on both sides of planet, so that 18% safe limit should be the same, as a way cloth masks interfere with air flows.
the reasoning propaganda for the masks were always bullshit, but assertions of O2 deprivation aren't accurate at all
You could literally check it yourself for few bucks. You need a cheap electrochemical oxygen sensor, something like this https://aliexpress.com/item/1005004689458078.html and any multimeter. Sensor is a kind of battery and voltage is linearly proportional to oxygen concentration. Measuring voltage in steady air you get calibration point for 20.9% as it should be in Earth atmosphere. Remember voltage it gives. Other calibration point is 0% when sensor will give 0V output. Then, measured O2 concentration equal measured_voltage * 20.9% / open_air_voltage.
Sensor is pretty sensitive and works from 0% - 100% oxygen concentration.
Then, you just measure oxygen consentration under the mask. For regular surgical blue mask it will be 18% and below, depending on breathing rate.
I had few of that sensors to measure quality of welding oxygen, engine exhaust and other things, so I successfully used that sensors to troll some maks mandate defenders among some acquaintances (not friends, have no such friends who defended that shit) since the beginnign of coronahoax. In most cases finding the truth by themselves worked out even for dumbest of them. There was one or two completely dumb, with "yes, it's lower than safe concentration, but you are not a doctor and killing and grandma!!!111" refusal, but fuck them.
Surgical mask prevents normal output air flow and oxygen depleted air stays under the mask (and around), instead of being streamed down from nostrils, in huge amounts, so on breath in you have a significant lack of oxygen in incoming air.
You could literally measure oxygen deprivation for fucking $35 and see by your own eyes what is really happening. You don't need to be a fucking doctor or rocket scientist to do it.
Why are you people so incurious? What makes you unable to even think about checking things by yourself and force you to look for some authority that you for some reason think will be believeable?
for decades there's been people in the trades having to wear masks or respirators. if masks were restricting 02, OSHA would've gotten involved.
IDK about OSHA or whatever, but in Russia, guidelines for surgeons who have to use surgical masks says that they should be changed every 40 minutes with some time between changes. Cloth masks for industry is not regulated at all, because they are not officially allowed for industrial use. Only for home/hobby use. For industrial use respirators and gas-masks licensed with valve system to separate air ins and outs so they does not mix breathed out and breathed in air. Official limit for oxygen concentration in breathing air when human could be allowed to be exposed to without additional breathing apparatus is 18%. Everything below is accounted as harmful.
Something tells me that you will find similar guidlines for US surgeons and rulings for industry. And of course you will not find anything about wearing that chineese made cloth masks for any prolonged period of time as was forced by insane WHO terrorist organisation and their accomplices rulings. You know, human beings and laws of physics are very similar on both sides of planet, so that 18% safe limit should be the same, as a way cloth masks interfere with air flows.