btgc
Veteran
I know recommended volumes for both 135 (290/300ml) and 120 (500ml) films but let's clarify - I want to use some highly diluted LC29 solution equivalent to HC100's dil G and keeping in mind there's minimal amount of developer per roll of 36 exposures I need total 720ml of liquid (1+74, where in case of LC29 1 part of solution is 9.6ml), well, let it be 710ml if rounded to 9.5ml
So please tell from experience or measure of this tank can take this amount of liquid with one reel and column, of course. Probably for this I will need 3-reel tank or make of another manufacturer, at all. Or there's some obvious alternate path in this direction?
I have tried LC29 at 1+74 in my existing one-reel tank, using 15exp strip and using 4.5ml of concentrate, but I can not do whole roll in it at given dilution (so I think, assuming minimal amount mentioned by Ilford has to be trusted).
So please tell from experience or measure of this tank can take this amount of liquid with one reel and column, of course. Probably for this I will need 3-reel tank or make of another manufacturer, at all. Or there's some obvious alternate path in this direction?
I have tried LC29 at 1+74 in my existing one-reel tank, using 15exp strip and using 4.5ml of concentrate, but I can not do whole roll in it at given dilution (so I think, assuming minimal amount mentioned by Ilford has to be trusted).
Ronald M
Veteran
Volume requirements are on the bottom of the tank.
If not, fill with water to cover the top reel, them measure separately.
Do not over fill as the empty space is required for agitation.
If not, fill with water to cover the top reel, them measure separately.
Do not over fill as the empty space is required for agitation.
btgc
Veteran
I should have be more exact - I don't have this tank and I'm asking if it will take 720ml before buying...because of weak dilution I'll have more liquid than for stronger dilutions and I want to have idea if tank is large enough.
haempe
Well-known
No, 720 ml do not fit into it. Go for the 3 reel tank.
btgc
Veteran
bummer...suddenly I can't find where I did see 9.6ml as minimal amount per roll....have I sucked it out of finger? Now I only find Ilford mentions 10ml as it is easier to measure and they were building fool proof instructions, because it is much easier to pour 10ml of developer than any small number with decimal parts. Probably my memory has played a joke with me. Probably I've calculated 9.6ml for some dilution to try and it replaced suggested 10ml as a minimal amount....but as I see it, 10ml are just suggestion for easier measuring and to be on safe side (e.g. film with most of frames of white snow or blankets).
Searching around I've seen on net people have developed film using 4-5-6ml per roll, some mention 120 but again memory suggests 120 film has about same surface as 36exp 135 film. So I can assume I need less than 720ml volume I asked initially, even using 8ml*(1+74)=600ml I should be OK with this tank, and even try 6ml(1+100) for stand. Looks path is clear, though if somebody has remarks and thoughts - I'll appreciate.
upd: thanks Haempe, did see your response just after typed this but 720ml requirement has lowered to 600ml, and it uses 290ml per 1x135, so it takes at least 580ml and most probably also 600ml.
Searching around I've seen on net people have developed film using 4-5-6ml per roll, some mention 120 but again memory suggests 120 film has about same surface as 36exp 135 film. So I can assume I need less than 720ml volume I asked initially, even using 8ml*(1+74)=600ml I should be OK with this tank, and even try 6ml(1+100) for stand. Looks path is clear, though if somebody has remarks and thoughts - I'll appreciate.
upd: thanks Haempe, did see your response just after typed this but 720ml requirement has lowered to 600ml, and it uses 290ml per 1x135, so it takes at least 580ml and most probably also 600ml.
haempe
Well-known
With 600 ml it will work. 
kxl
Social Documentary
You have to find out what the true min amount is and add enough concentrate to get to the min volume..
Example - HC-110 Dif F (1:79) requires 3.8ml per roll in a 300ml tank. However, HC-110 minimum in general should be 6ml. So two options are 1) to use a larger tank or 2) keep the 300ml tank, but use 6ml instead of 3.8 ml. Yes, it is no longer 1:79, but the min volume of concentrate trumps the dilution ratio.
Example - HC-110 Dif F (1:79) requires 3.8ml per roll in a 300ml tank. However, HC-110 minimum in general should be 6ml. So two options are 1) to use a larger tank or 2) keep the 300ml tank, but use 6ml instead of 3.8 ml. Yes, it is no longer 1:79, but the min volume of concentrate trumps the dilution ratio.
