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Washing with daylight tank; controlling temperature


Tony Rowlett

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It's easy for me to control the temperature of water coming out of the faucet when the water is coming out at normal rates, i.e. rates that would seem to be too much for the small Minox daylight tank. When I diminish the water flow to the recommended thin stream, I find it almost impossible to control temperature, even a little bit. Not a huge problem with films like Tri-X, but I am more concerned with Tmax 100, the film I'm currently using.<p>

Questions:<p>

<ul>

<li>Is film adequately washed with a much higher rate of flow from the faucet when using the daylight tank? Does it go inside properly or is it just pushed over the top?

<li>With a lower, thin-stream flow, how do you control temperature to at least keep it in the ballpark of 65-70F ?

</ul>

Backups? We don’t need no stinking ba #.’  _ ,    J

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A dissenting view: I know this is heresy, but I only use the Minox

Tank for development proper.

 

<p>

 

When my timer goes off, I turn off the lights, pull out the Tank

spiral with the film still on it (I use my right thumb to keep the

cassette on its little mount), dunk it into a large graduate of water

(roughly the right temperature, to prevent reticulation) two or three

times, then unspool the film and drop it into a tray of fixer. After

about a minute, I turn on the lights and swish the film around in the

fixer tray until it's clear (taking care not to scratch the emulsion

side), then leave it in the fixer for a couple of additional minutes.

 

<p>

 

I then wash the film in a small tray with a faucet running into it

(again at roughly the right temperature to prevent reticulation),

swirling the film from the cassette end and taking care not to bruise

the emulsion side. Most films only need about three minutes of this,

but TMX takes roughly twice as long to finally lose its purplish

cast. Then a quick dunk in a dilute PhotoFlo solution, and hang it up.

 

<p>

 

I've done this with nearly a hundred rolls over the years - the Minox

Tank is THE solution for developing, but for rinsing, fixing, and

washing, I find not using it works fine... and I NEVER worry about

adequate solutions at each stage, as I'm using vast amounts of them

compared to the size of the film.

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  • 19 years later...

I'm sure the higher flow will still give you good washing. Sure, more is going over the edge, but the turbulence will be greater and should get down to the bottom.

Personally, unless I want to develop in the field (can't remember the last time I did that), I use stainless reels and tanks. I know you have to load in the dark, but the minor size reels are very easy to load. Then I can treat just like 35mm or 120 film. Just my way.

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I'd either hang something like a solar shower bag (full of enough water at hopefully right temperature - tap too hot, it'll get there) over my bathtub and drain the needed rinsing water from there or change water multiple times instead of keeping it flowing.
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