There are a few other threads on the web which suggest that this aspect of the Fuji instructions don’t make sense, so it’s hard to have confidence in the calculations. So either the maximum number of films that can be developed with a 5 litre batch is 80, rather than 120, or you should increase the batch size before increasing the development time, to 24 instead of 16. The mathematically sharp-eyed amongst you will have notice that 5*16 is 80, not 120.However, there are a few problems with this explanation: When you develop the LAST batch of 16 films you increase the development time to 3’27”Īt this point, Fuji recommends that you should not develop any more films with this batch of chemicals.When you develop the NEXT 16 films you increase the development time to 3’26”.When you develop the NEXT 16 films you increase the development time to 3’23”.When you develop the NEXT 16 films with the same 5 litre batch of chemicals, then you increase the processing time to compensate for the partial exhaustion of the chemicals.When you develop the first 16 films with this 5 litre batch of chemicals, you would use the processing time 3’15” (3 minutes and 15 seconds).The last column tells us that the most films which Fuji think you can develop with 5 litres, is 120 films. So we’ll start off by just looking at the first data row in the table, which applies if you are developing ISO100 film in 120 format. Unless you’re processing film commercially, or you shoot an awful lot of C41 film in a short space of time, this might be unlikely and the instructions will have to be amended for a smaller amount of chemicals. First, I’ve actually amended the title of the last column to make it clear that this table would apply if you made up all of the chemicals it once, to give you 5 litres of solution. So I’ll try to put in into words and see if I can make it clear. One of my most popular posts, according to my WordPress stats, was one I wrote in 2015 which reprinted a legible version of the instructions for the Fuji Hunt X-press C41 developing kit.Ī few readers have asked for more explanation of one table in the instructions – this one below:
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