AdeoMikelo
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Hello there,
I'm reading manual for Ilford ID-11 developer and wonder how much Ilford HP5+ 400 speed 120 rolls can I process with 1l solution.
I'll be using Paterson development tank with 120 spiral, which takes 600ml.
1. First option is not to dilute (stock). After developing the first film increase the development time 10% for each successive film. I'll pour back used fluid to the stock solution, mix it and then continue development. This way I can process 10 rolls.
2. Second option is to dilute 1+3 so I'll get 4l. This is one-shot solution, so I have to divide 4l by 600ml and it'll give me full 6 tanks to develop. This way I can process only 6 rolls (and I'm left with 400ml).
If I'm thinking correctly with 35mm roll (which takes 300ml in Paterson) the second option will give 13 rolls. But shouldn't 35 be equal to 120 in terms of emulsion to develop?
Are my calculations right, or am I missing something?
I'm reading manual for Ilford ID-11 developer and wonder how much Ilford HP5+ 400 speed 120 rolls can I process with 1l solution.
I'll be using Paterson development tank with 120 spiral, which takes 600ml.
1. First option is not to dilute (stock). After developing the first film increase the development time 10% for each successive film. I'll pour back used fluid to the stock solution, mix it and then continue development. This way I can process 10 rolls.
2. Second option is to dilute 1+3 so I'll get 4l. This is one-shot solution, so I have to divide 4l by 600ml and it'll give me full 6 tanks to develop. This way I can process only 6 rolls (and I'm left with 400ml).
If I'm thinking correctly with 35mm roll (which takes 300ml in Paterson) the second option will give 13 rolls. But shouldn't 35 be equal to 120 in terms of emulsion to develop?
Are my calculations right, or am I missing something?
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