Chemical storage - why don't they......?
Was having a random thought about storing chemicals and wondered why...?
Plastic seems to leach oxygen into the liquid, oxidising it;
Glass is the preferred option as this doesn't leach oxygen, though;
A partially filled glass bottle has oygen in contact with the fluid - oxidising it.
Why don't glass bottles come with a thin floating lid inside them to minimise the contact area with the oxygen in the part filled bottle?
Not sure how this would be done - but they do get ships inside bottles
Then I got carried away with thoughts of bottles like bar optics; upside down on a rack with "twiddle" knobs to dispense at the base and floating lids!
Just a thought, but why not?
If you were so inclined you could always draw a vacuum on the glass bottle then fill it with an inert gas after every use, or have it hooked to a lightly pressurized inert gas canister so you had a dispenser style system with inert gas as the propellant.
Or just fill the bottle with glass marbles until the fluid level reaches the top. I know, not brainstorming the OT but I have always tried to ascribe to any KISS method applicable, myself.
---or--- only fill it half way, evacuate and re-pressurize with 2 atm of Nitrogen, turn up-side down with a dispensing spigot.
Evacuation is a bit tricky - water boils in a vacuum...
[QUOTE=Christopher Walrath;1090306]Or just fill the bottle with glass marbles./QUOTE]
I tried that - forgot the bottle was full of marbles when I poured. One heck of a mess... Don't do it with a wide-mouth bottle.
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They did make metal containers with floating lids and bottom spigots at one time. I have 2 of the cans with no lids. I also have a heavy duty plastic container with floating lid and spigot. These were very handy, but have vanished as time went by.
Originally Posted by Kitten
Ooooo, I like this one - just need to rig it up to a multi-outlet handheld dispenser like they use for soft drinks. Nothing can go wrong here!!!
Originally Posted by Photo Engineer
Now I remember that at one agency we had big plastic containers with floating lids to feed the E6 dip and dunk, also for the Mutigrade print processor - but I reckon the 2 litres or so of chemicals I use now would be like a small puddle in the base of these monsters
Yep, this is the sensible solution that I know I will end up with. As you say, KISS.
Originally Posted by Christopher Walrath
But oh, the dreams of automated pressurized non-oxidised chemicals on demand.
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.