Quote Originally Posted by StoneNYC View Post
Ok so if I don't have access to nitrogen gas, and only store in the brown glass chemistry bottles (because the owner insists they don't feel comfortable with plastic bottle storage in the basement) then how do you keep it air tight? I've seen marbles mentioned so I tried this, but this only meant spilled marbles into my paterson tank and cracked glass chips in the developer. not putting the marbles in the developer, but when they spilled out while I was filing the paterson tank, some went down the garbage disposal too, it was a disaster...

That's why I'm trying for smaller bottles of concentrate.

And you say no air exposure, so this means period right? So how can I mix the powder and water without exposure? Or do you just mean constant air exposure, so if I fill the bottle to the brim and there is just a tiny air bubble, is that good enough for a few months do you think?

Or is there some tool I'm missing that does this?


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The best thing to do, determine how much you need, say you use a steel tank that holds 250ml, you buy a case of 24 250ml bottles, you need 4 per Litre, so 20 for 5L, you have 4 spares in case some get broken. Get a B&W print tray, and put the first empty bottle in it, and fill to the brim and add the cap, keep doing this until you run out of developer, pour from the tray back into the container and continue on, until all the developer is in bottles. Wash the bottles off and let them dry. Get some plastic wrap or aluminium foil, cut into 6" squares, put this over each cap and seal with electrical tape. Although glass bottles are air tight, they often use plastic lids that are not, so the plastic wrap is an extra air seal. Many developers can live in those bottles air tight for months. The seal is also an indicator to you, that the bottle has not been used. So you should have one or more sealed ones, and one unsealed one. When the developer in a bottle is all used up, you dump it, wash out the bottle, put it with the clean ones and unseal another. One note, a 250ml bottle filled to the brim is probably closer to 275ml, as the bottles are designed to be only partly filled.

Bleach needs some air, so it can go in a single bottle. Fixer and final rinse don't really care one way or the other. Although you can often just mix it as you need it. So if your using 250ml at a time, and there is 1L of concentrate to make 5L you can mix 50ml of concentrate with 200ml of water to make 250ml, and that reduces contamination, in that if it gets skunky you can toss the working solution and mix fresh. One key trick, get one of those multi-colour packs of electrical tape, use one colour for developer, another for bleach, another for fixer, another for rinse, if developer is green, and you going to pour in the developer and your reaching for a bottle that has a red band, you should be going ...