Kodak replaced the product that made 1 gallon with a 1 liter concentrate to make 5 liters at 1:4. For anyone that used this developer in the past knows that Kodak publication J-86 provided all the details about mixing, storing and using this developer. On page 9 of that publication was a capacity chart that showed the total number of rolls you can process with 1 gallon. That total is 48 rolls of 36 exposure 35mm or 120 film without replenishment. You simply followed the recommended time for rolls 1 to 16 then added one minute for rolls 17 to 32 and two minutes for the remained 33 to 48 rolls. This allowed you to put the spent developer back in with the working solution and simply keep reusing it until the 48 roll capacity was exhausted.
Kodak has not since updated the publication to replace the 1 gallon concentrate with the 1 liter. I did some quick math and put together my own chart for the newly packaged 1 liter concentrate when mixed with 4 liters of water to give you a 5 liter working solution.
The formula: 128 oz. per gallon. 48 rolls per gallon. Divide these two and you get 2.8 rolls per oz. 5 liters translates to 169 oz. 169 divided by 2.8 rolls = 60 rolls per 5 liter mix. Simply divide this by 3 to get the range.
1 to 20 rolls: normal development time
21 to 40 rolls: normal development time +1 minute
41 to 60 rolls: normal development time + 2 minutes
The 1 liter concentrate sells for approximately $20. This averages $3 per roll developed.
