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Good Results with IPA Final Rinse


j.w.

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I've heard from previous discussions the merits of using isopropyl

alcohol as a final rinse agent, in place of surfactants such as Photo-

Flo, but hadn't tried it until this week.

 

The film was Tri-X 320 Pro, 120 format, developed in HC-110 using

dilution B for 5:30. For the final rinse, I mixed a 2:1 ratio of

distilled water and 91% IPA in my Jobo tank, then dipped and dunked

the film reel intermittently for several minutes. The film was then

immediately hung to dry in a warm, clean environment.

 

The results were what I was hoping for: absolutely no drying marks or

streaks, just nice, clean negatives.

 

I hope this helps someone who has been having issues with streaks

post drying.

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Ethyl alcohol (india pale ale) is metabolized by the enzyme alcohol

dehydrogenase, converting it to ethyl aldehyde, which is the thing that gives

ya a hangover. (Many American Indians have very little of this enzyme,

which is why alcoholism so prevalent.) Iso or methyl alcohol is metabolized

into formaldehyde, which makes ya blind. Least then I'd have an excuse. So

don't drink it!

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After 30+ years of processing negatives I have found that dipping the film into distilled water as the final rinse and then hanging to dry works as well as anything else on the market. Why spend lots of money when distilled water will do the trick.
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"<cite>Why spend lots of money when distilled water will do the trick.</cite>"

<P>

The cost of the wetting agent and isoprop as a Aqua Dest additive is measured in pennies per litre of final rinse. Aqua Dest alone is significantly less efficient and can, under some conditions, still leave spots. The cost of such damage, even if limited to the pure material costs, is significantly higher than the cost to process many rolls of film with an "enhanced" rinse.

<P>

If one is looking for thrift one can instead of the expensive demineralized water or Aqua Dest as the main ingredient in the final rinse use boiled and decanted tap water.

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  • 13 years later...
After 30+ years of processing negatives I have found that dipping the film into distilled water as the final rinse and then hanging to dry works as well as anything else on the market. Why spend lots of money when distilled water will do the trick.

In my experience rinsing in distilled water still leaves dry marks :(

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  • 1 year later...
Dunno how it helps prevent water spots, but I'm sure it raises the IBUs a bit...

Who the h*ll understands International Bittering Units?

 

I once asked a publican how bitter a beer simply described as 'well-hopped' was. He quoted me the brewer's IBU specification, as if that helped in the slightest. IBUs don't tell you if the misguided use of Citra hops turn your beer into a grapefruit shandy style drink either. :eek:

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