Quote Originally Posted by stefan4u View Post
Dear Humble.

By reading the manual you will find that (diluted) working solutions will keep worse than the concentrates…
So do not mix the whole 5 liter unless you need them in foreseenable time / do better a part mix.
If using seldom it may be beneficial to divide the developer concentrates into fractions and store it in smaller airtight PET bottles, exclude air and keep the concentrates cool (about 5°C, do not freeze!) If doing so, divide the fixer too (the clear BX part), the bleach (BX part 1, the red one) does not need such attention…

The mentioned protectan was indented to displace oxygen/air over the liquid in the bottles (originally a Freon mixture). It can be substituted by butane gas if you keep in mind that this is highly flammable…

Regards Stefan
Thanks Stefan,

Assuming I do as you suggest: divide & keep cool, how long will it keep in this state?