A lot of people start airbrushing using canned gas as a propellant. It's common knowledge that the pressure from these cans varies with temperature. I decided to see if I could put some numbers on it.
Here is the pressure from a can of Badger Propel at a room temperature of 79 degrees F.
Notice the pressure is about 41 psi.
Here is the pressure when the can is chilled to 32 degrees F.
The pressure has dropped to about 13 psi. So, if you have to use canned propellant, keep it warm, but not too warm. Instructions on the can say not to exceed 120 degrees F. Like any spray can or container of compressed gas, it will get cold as it is used. So, putting it in a bucket of warm water is probably a good idea.
But, in my humble opinion, anyone wanting to airbrush should invest in a regulated source of air first.
I am adding this info to my website.
Don