Explain please ..
this post was submitted on 20 Dec 2025
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Might just be a home user regassing his air conditioner. Air duster is usually just r410a
Really? I think air duster is usually just pure CO2 (the ones without HFC at least)
CO2 is 750+ psi at room temperature. A pressed sheet steel can is typically less than 100psi.
If you don't use a liquid propellant, the pressure will drop a lot as you use it. The effect is worse the fuller the can is.
https://www.justrite.com/understanding-aerosol-propellants
https://science.howstuffworks.com/innovation/everyday-innovations/aerosol-can3.htm
It's compressed CO2, not liquid CO2.
They marketed is as a non flammable non HFC air duster which you can hold upside down, often with something like 360 or something in the name. Since it's just compressed gas, it doesn't spray a liquid like the HFC ones do.
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I bought this many recently... I just use them to clean/dry my 3D prints off after a wash so I go through a few every year.
They also work great for getting PETG prints to release from PEI build plates. Flip the can upside down, spray at the back of the sheet where the print is until it forms a thin layer of frost. Wait until the frost disappears (really you're waiting for the metal to contract, but you won't see that), bend the plate, and the part should pop right off.
...then flee to somewhere better ventilated to escape the cloud of bitterant before you vomit.
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Now THIS is walking on sunshine
They say you're not supposed to use a vacuum but I do.
