The best Water for mixing your Developer?

Pirate

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So what's the latest word on the best water for mixing up a batch of developer? Hard, Soft, Filtered, RO, Distilled...?

I'll be mixing up some Xtol in the next week and would like to find what works best with it. Before I havn't bothered caring much, but I'm to the point where I'd like to start taking this into consideration.

Thanks for any input.
 
I only ever bother to use distilled or filtered water for the final rinse. When mixing solutions I use tap water.
 
A Kodak rep told me to always use tap water. They formulate their chemicals based on an average mineral content. Imagine having to buy distilled water to mix chemicals in a commercial labs processing machines. The processes aren't that critical esPecially B&W.

Every company I've worked for has always used traitor tap water.
 
I use distilled water for everything except the final wash. I just get it from my sons dehumidifier. When it's running a lot we load up as many gallon jugs as we can and it usually last for a long time.
 
xtol use distilled xtol tends to be less forgiving of minerals than some other developers and kodak recommends distilled for xtol I belive.
 
As I live in Rochester, I suppose I could just use tap water ... since Kodak formulated their chemicals here. 😀

But ... I don't. Since we have enough humidity to run a dehumidifier in the basement, I use that. I use a Melita filter first, then run it through a Brita. The Brita probably isn't necessary, but it makes me feel more comfortable.

The reason I do this is to be consistent and eliminate variables. Wolfgang Moersch strongly recommends using distilled water for his staining developers (Tanol, Tanol Speed & Finol), and I use Finol from time to time.
 
Since So Cal water has a lot of other junk in our tab, I use distilled water.

I learned the hard way after my solutions started behaving funky after the first couple rolls.
 
I use a higher quality (filters smaller minerals: 200+ Micron in size), Charcoal Filter on my kitchen tap. it has a LED gallon gauge so I know when 200 gallons is reached, so I know when to change the filter.
 
A Kodak rep told me to always use tap water. They formulate their chemicals based on an average mineral content. Imagine having to buy distilled water to mix chemicals in a commercial labs processing machines. The processes aren't that critical esPecially B&W.

Every company I've worked for has always used traitor tap water.

Commercial processors adjust the developer based on test trips each day, which compensates for water quality differences. I've seen major differences between films developed in the tap water in different cities I have lived in. The Kodak rep lied to you. Chemists ALWAYS use distilled water, because they need repeatable results. Many developers have chemicals added, like EDTA, to reduce the effect of dissolved minerals and other chemicals. It is still better to use pure water.
 
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