Thank you for taking the time.Your colour chemicals are based on a workflow that is and was oriented toward continual, repeated use of replenished chemicals in order to develop many, many rolls of film, with just a little bit of chemical dumped and a little bit of fresh chemical added for each roll developed.
The kit you have used probably isn't set up for replenishing, but the chemicals are sufficiently similar to those chemicals that are designed for replenishment. As a result, it isn't surprising that you are able to squeeze a bunch of extra film development out of them, as long as you are content with colour and contrast and crossover that gets worse and worse as you get past the recommended capacity.
There are some black and white chemicals - XTol comes to mind, as does Diafine - which are designed either for replenishment or with repeated re-use in mind. And concentrated developer - designed to be diluted 1 + 9 - is unlikely to be set up for that. Most concentrated developers are designed for dilution and limited re-use - often no re-use. My advice is to follow the manufacturer's instructions about capacity and re-use.
My friend tells me she can reuse her black and white chemicals for up to a few months. Is it because she uses different chemicals?
I guess I was curious to understand why it can process three rolls in a row properly but takes a 180 turn after two days and barely produces any results at all all of a sudden
As noted my MattKing, Color and B&W are two different system. C41 and E6 are closed system, not mix and match like B&W. With B&W you can pick a developer that can replenished, Extol, D76, DK50, to name just few. Other developers are one and done. To complicate matters some developers that be replenished stock, when diluted become a one and done. D76 1:1 and 1:2 are one and one. Stop bath and fixer have a given amount of capacity, the manufacture's data sheet will list the number of rolls or square inches of film that a given stop bath, fixer, clearing agent will process.
If you are using Adox or a Rondinal developer it is one and done, dump it. If you are using Extol or D76 stock you can replenish following the guide lines. Issue is not many replenishes are still being made, Xtol uses stock to replenish Although D76 cannot be replenished a gallon will develop a lot of film, when used at 1:2 a lot of film. dused not sure how many rolls, you do add time after a given number of rolls. Unless you are shooting a lot of film I think a one and done developer is the best way to go. For fix, I mix a gallon at a time and use what is called hypo check to make sure it is not exhausted. Hyp clearing is so cheap I just dump, Stop bath turns blue when used up. Photoflow for me is one and done. I currently use Kodak HC 110, it is one and done, in the past I have Clayton F76+ 1:9 one and done.
Whilst reusing chemicals with a developer such as Pyrocat is not entirely necessary, in that the chemicals are not that expensive in their base form, disposal is always an issue, and I'd much prefer to not put carcinogens down my apartment sink, in case my landlord figures out what I'm doing with that 2nd bathroom.
Thank you for taking the time.
Unfortunately I cannot find much from the manufacturer's about reusing the Adox FX-39.
I guess I was curious to understand why it can process three rolls in a row properly but takes a 180 turn after two days and barely produces any results at all all of a sudden, if it is the air in the bottle making it go bad or another factor.
I may be overly predictable in promoting Barry Thornton's 2-bath developer yet again, but it offers you substantially longer shelf life because the two working solutions hold the developing agent and alkali separately, and are re-used. I keep mine in 1 litre bottles until they have processed their expected capacity, but this can take several months or even a year. Stop bath keeps well after dilution, and the indicator will tell you when it needs replacing. Ilford Rapid Fixer keeps for months after dilution, and has a high capacity, but I generally discard all my chemicals together when Bath A of the developer has reached its capacity (theoretically about fourteen 36-exp 35mm films). I now replace Bath B of the developer several times during this cycle because of carry-over, but it's very cheap and easy to mix.
Of course, you may be wedded to FX-39 for some reason...
I'm definitely not married to the FX-39 - I just like that it costs $9 and it's a one-bottle developper.
Do you use the Barry Thornton dev? How long is it for each bath? Does it also come with a fixing step?
I have been using Thornton's 2-bath for a while now. Depending on the film, it's about 4 to 5 min in each bath. After the second bath, you stop and fix as per normal.
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