as an artist in general i don't sweat the mixture... but it's approximately 2 heaping tablespoons of salt, a small tea cup of vinegar essence which is 7 times as strong as normal vinegar, i don't know how much water but i guess it's between 2 & 3 liters.
I made a round frame out of cardboard, cardboard bottomed one side ot it (w/hot-glue gun), spray glued a big thick leaf bag to the inside bottom So it won't touch the cymbal, and get as much even fluid around it. Duct tape around the top of frame for garbage bag. 3 pointy pyramids of wood to stabilize cymbal bow, and a wood-cone glued into cymbal stand hole so it's lifted 3/4 inch off round garbage-bagged frame, make sure it's water-tight. So it's just a big frying pan w/o a handle!
Cymbal: i only do top so cover the bottom with, depending on cymbal/situation: packing tape, or, a pre-cut garbage bag size of cymbal hot-glued to bottom rim. If it's a nice patina-ed old cymbal and for sure don't want the bottom affected i wipe on so cheap body lotion creme before i glue the plastic bag on.
The cymbal goes in upside down; get it as level as possible all the way round, then add the solution, 'till it covers top & starts going over into the bottom. Then it's a matter of checking progress, keeping the under-cymbal towelled off, and replacing the clear tape on top of bell everyother time to make sure i get a good seal. Oh and i read somewhere scrubbing w/ baking soda, when you're happy with your results, will instantly stop the patina process. Apparently the instant patina is more active & will continue the process for a while... I have no idea if it's true. I've done some w/o using baking soda after & they did not crumble to piles of dust.
I have revived bland old cymbals that have sounded dead because no one cleaned/de-patina-ed them. (Some are good like that some not.) These are not 'investments' to me. I need my cymbals to generally blend. I bought some gray early 80s UFiP hi-hats that, after gone over 3 times with Barkeeper's Friend, sound like a choir of angels. And of all the cymbals i own (maybe 40?) there's only 4 or 5 that the under-side has not been nuked w/BKF. The way i see it, i don't buy harsh sounding cymbals, used or new. And patina is a treble filter... nothing more nothing less. There's nothing cooler than an old Zildjian with a beautiful patina, and if it's current "filter" fits the cymbal, great! I have a 1940's 15" zildjian where i just BKF-ed it enough to add some highs but left around 60% of the patina... i guess i just wound the time-machine for that cymbal to how it was in 1971.