Watch out for acid burns!

[Melvin]

Just stupidly reached into a bottle of stop bath concentrate(acetic acid)and now have a burn on my finger. It's salad dressing right? Wrong! I just learned the hard way what the most dangerous chemical in my darkroom is.

 

[MartinP]

Probably not a good idea to use it with olive-oil on your lettuce either !!

😉

 

[Al Kaplan]

😱Use vinigar for stop bath. It's the only darkroom chemical that you can pay for with food stamps.

 

[wgerrard]

Apple, red wine, burgundy or champagne vinegar?🙂

(I sometimes pretend to cook.)

 

[Melvin]

Good info, good to know. I put the finger in baking soda paste to neutralize the acid, and since it was 'indicator' bath I now have a purple finger.

 

[Al Kaplan]

Stay with vinegar. Cheap enough, and since it's considered a food item there shouldn't be any sales tax on it.

 

[ItsReallyDarren]

I switched to water as my stop bath. No burns yet. I can even shower with that stuff.

Ok ok I still use acetic acid stop for prints.

 

[Melvin]

I live in Chicago, Al, and they tax everything here. In fact I'll probably get a ticket for having a purple finger. At least it's the middle one.

 

[Al Kaplan]

Well, here in Miami they do tax dog and cat food. It just might be cheaper to cook for your pets.

 

[Melvin]

No way am I cooking for that cat.

 

[sepiareverb]

I once poured straight stock solution Kodak Indicator Stop into a steel film developing tank. Thought to myself 'man that smells way to strong', then double checked the bottle. I poured out the developing tank to find the film (APX25 120) had turned into a gelatinous goo. The plastic lid was unaffected.

I always keep an empty Kodak Indicator Stop bottle in the darkroom now- I'd dropped the pint plastic bottle and transferred that stock solution into a glass bottle like I store my working solutions in. Won't make that mistake again.

It says 'Moron' under my name for a reason.

 

[sevo]

I once poured straight stock solution Kodak Indicator Stop into a steel film developing tank. Thought to myself 'man that smells way to strong', then double checked the bottle. I poured out the developing tank to find the film (APX25 120) had turned into a gelatinous goo. The plastic lid was unaffected.

That is not due to the acidic action, but to the acetate base being soluble in concentrated acetic acid.

Sevo

 

[sepiareverb]

That is not due to the acidic action, but to the acetate base being soluble in concentrated acetic acid.

Sevo

It says 'Moron' under my name for a reason.

 

[rxmd]

For film I use water with a tablespoon of citric acid. Costs under 1 EUR for half a kilo of powder, which will last for ages, is non-toxic, and is useful for cleaning mineral buildups around the house.