I am in the planning process of developing my own 135 film and I am wondering if it's okay to use only 500ml of developer in a paterson tank with 2 135 reels, instead of the 2*290=580 as it says in the instructions?
Can I just prolong the development time by 10% and be fine?
It would make it so much easier to split up a 1 liter Tetenal Colortec C41 chemical kit.
I don't take that many photos and would like to extend the shelf life as much as possible.