Sure it does, it makes the math a heck of a lot easier, I use HC110 Dilution S (for Stone) of 1:25 because 1:31 gives me a headache trying to calculate the increases for each film. Maybe I'm a simpleton, but 1:50/1:25/1:100 are much easier to calculate.
~Stone | Sent w/ iPhone using Tapatalk
Depends on whether you work in metric or english system. I use whichever is easiest for the dilution I'm using! So for 1+31 I'd use an ounce of concentrate to make a quart of solution.