How much developer for 2 reels?

[luis ducoing]

I use a plastic one reel tank for 120 film wich uses 500ml per roll, I just got a steel tank that holds 2 steel reels but I dont know how much developer to use, any one using these tanks? thank you!

 

[ann]

off the top of my head i don't remember, just take an empty tank and pour some water into it and pour that into a beaker and you will know how much. I want to say 16oz as a one reel steel tank uses 8 * 35mm, but don't take that is the final answer

 

[mgb74]

I assume you mean 2 120 reels. My tank will cover 2 120 reels with 800ml of solution.

 

[David A. Goldfarb]

32 oz or 1 litre normally for two medium format stainless steel reels. You could measure and probably manage with a bit less, but I find it easier to calculate the dilution (depending on the developer of course) with round figures.

 

[mwdake]

any one using these tanks?

What brand of tank?

Did you look on the bottom, some tanks are marked with the volumd needed for different reel configurations.

 

[MattKing]

When you pour the water in to check, make sure you have the reels in there too.
Matt

 

[Anscojohn]

I use a plastic one reel tank for 120 film wich uses 500ml per roll, I just got a steel tank that holds 2 steel reels but I dont know how much developer to use, any one using these tanks? thank you!

******
About 900 ml should do it just fine.

 

[seawolf66]

My stainless Nikor tank takes 28oz of developer with two 120 reel's in side it:

 

[John Shriver]

A Nikor tank large enough for two 120 or four 135 reels was known as a Q30, because it needed 30 fluid ounces of developer. The tank for one 135 was a Q8, the one for two 135 or one 120 was a Q15.

You want some air between the top of the reel and the tank lid, lets the developer move a lot more when agitating by inversion.

 

[vedmak]

I have read that kodak made a test with d-76 and for a 35mm 36 exposures they came out with minimum of 150 ml - but given the price of the developer and contamination, or quality of water and such, it is best to use more, how much more depends on your technique, two things are for sure: developer should cover all the reels and there should be some air pocket between the developer and the cover, so that agitation can happen.

 

[Brandon D.]

You want some air between the top of the reel and the tank lid, lets the developer move a lot more when agitating by inversion.

Agreed. And to add, the instructions for the developer I use say that there needs to at least be enough developer to cover both reels in order to ensure even development.

I think what I did when I was trying to figure this out myself was A) put both empty reels into the tank, B) poured enough water into the tank to see how much liquid it would take to cover both reels, and C) poured that water into a graduated cylinder to record the measurement. I rounded the measurement up, and I have had no problems developing, stopping, and fixing my film.

 

[George Collier]

I did the test Brandon mentions above, which gave me 425ml per 120 roll, Hewes reels in a Kinderman tank. I mix 500ml for math convenience and use 425 measured. This also gives plenty of room for chemistry movement at the top.

 

[philosomatographer]

I just developed two 120 rolls in a Nikor steel tank, and as others have said, 1 litre does the trick (950ml if you want to be pedantic).