Metal developing tanks vs. Plastic

[lynettemax]

Hey everyone!
Today I developed two rolls of 120 film in a metal developing tank oppose to a plastic tank. Has anyone seen any dramatic changes in the film?

I use the same film every time i shoot and have great results when I develop in a plastic tank. The one time i change to metal tanks my film is dramatically over exposed.

Has anyone had results like this before?

Thanks for the help!

 

[Anscojohn]

If it is over exposure, it has nothing to do with development.

 

[mgb74]

I assume you mean over developed, rather than over exposed.

I have not experienced this. Were you using the same developer and dilution? My first though would be an inadvertent error in time, temp, or dilution. The only other possibility I could imagine is if you had the stainless steel tank in a very warm ambient temperature resulting in higher developer temperature.

 

[lynettemax]

I assume you mean over developed, rather than over exposed.

Excuse me yes i did mean over developed, switch of words on my part. I took a temperature of the developer, normal, 68 degrees. Also I pre-soaked the film in room temperature water as well, so I don't believe the tank was warm.

 

[alexmacphee]

I've not noticed this with metal tanks. I always put my tanks in a 20C/68F water bath to equilibrate before and during development, because metal conducts heat so much more effectively than plastic, but I do the same with plastic tanks too, as I've just got into the habit over the years. My first thoughts here were on dilution error.

 

[Rick A]

In all my 40+ years of developing I have never noticed any difference, other than my mistakes. Developing vessel has no bearing on the finished product, only the materials used and the operator.

 

[removed account4]

a friend used to always tell me that metal tanks would warm from my body temperature and then warm the fluid in the tank
(transference ) ... i've never noticed that it ever happened ...
then again, i don't hold the tank in my hands the whole time i am processing the film ...