I used to work on and build custom paintball equipment, and I have high- and low-pressure regulators, electronics, and CO2 tanks. I suppose C02 would work, other than possibly decreasing the pH of the developer. The only thing I need is a solenoid valve. I have some small ones but I don't think they would pass enough gas.
Science is what we understand well enough to explain to a computer. Art is everything else we do.
--A=B by Petkovšek et. al.
Exactly the reason Nitrogen was chosen. Nitrogen is inert. CO2 is not. The pH of a developer is crucialI suppose C02 would work, other than possibly decreasing the pH of the developer.
I'm currently using one-shot developer. I guess I could monitor the pH of the developer with ph paper to see if it changes significantly during one development session. Then again, with one shot developer I could probably use compressed air too.
I just rummaged through my electronics and found a 1/8" NPT, 120V solenoid valve, that apparently works. So I'm pretty set now except for the actual gas distributor thing.
Science is what we understand well enough to explain to a computer. Art is everything else we do.
--A=B by Petkovšek et. al.
The other problem with compressed air is that it contains oxygen. Oxidization of developer, especially dilute one shot developers like pyro can have an adverse effect. That is why nitrogen is used - it won't oxidize the developer.
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