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Author Topic: Elon, Metol, etc.  (Read 684 times)

spclark

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Elon, Metol, etc.
« on: January 17, 2021, 02:47:03 pm »

Found some B&W chemical components used to make developers I'd saved from decades ago recently. Containers unopened since maybe 1973, stuff seems to be still viable... never wet, exposed to air.

Anyone interested in them PM me for a list & give me your location. I'd rather not just dump the stuff I can dump into the sewer.

I'm in SW Wisconsin if that helps any. Hopefully this stuff could be shipped UPS Ground w/o too much hassle.

The developer stuff needs more careful handling, probably haz-mat now....

All Kodak brand: Balanced Alkali, Potassium Carbonate, Rapid Selenium toner, Potassium Ferricyanide, then some unopened Neofin ROT (red) developed in glass vials...
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Eric Myrvaagnes

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Re: Elon, Metol, etc.
« Reply #1 on: January 17, 2021, 07:42:55 pm »

The Potassium Ferricyanide is extremely dangerous. You should check on whether your locality has a drop-off location for hazardous chemicals. Our city has one once a month. I am taking mine there for the next open time.

I think the other chemicals are relatively harmless, but you might want to check with a hazardous chemical drop-off site, since they should have a list of what the baddies are.

Good luck!
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nirpat89

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Re: Elon, Metol, etc.
« Reply #2 on: January 18, 2021, 12:05:03 pm »

Potassium ferricyanide is dangerous only if it comes in contact with concentrated strong acids.  Otherwise it is pretty harmless - is one of the 2 main ingredients in cyanotypes, considered to be fairly safe process.  By all means though, for disposal it is advisable to take it to chemical disposal site with proper labeling to reflect the content.

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Eric Myrvaagnes

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Re: Elon, Metol, etc.
« Reply #3 on: January 18, 2021, 02:16:34 pm »

Thanks for the clarification, Niranjan.
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nirpat89

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Re: Elon, Metol, etc.
« Reply #4 on: January 18, 2021, 05:59:13 pm »

Thanks for the clarification, Niranjan.

No problem...been working a lot on learning cyanotypes lately so I familiarized myself with limits of this particular "cyanide" - no high heat (over 200C) and no concentrated strong acids like sulfuric, hydrochloric etc.  Same applies to potassium ferrOcyanide which is also found in traditional darkroom. 

An interesting case of someone who tried to commit suicide with a spoonful of potassium ferricyanide and lived:

https://www.tandfonline.com/doi/pdf/10.3109/15563659609013821 
« Last Edit: January 22, 2021, 04:53:26 pm by nirpat89 »
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deanwork

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Re: Elon, Metol, etc.
« Reply #5 on: April 30, 2021, 08:06:10 pm »

That is a myth that cyanotypes are safe. I had a teacher in grad school who was well know for her large beautiful cyanotypes. What happed was the poison accumulated over time in her liver and put her in the hospital with severe liver damage. It could have killed her and resulted in lasting health issues. The doctors told her that when potassium ferrocyanide is mixed with ferric ammonium citrate a poison gas is released and absorbed into the tissue ending up in the liver. She had no symptoms for years, then bam poisoned and rushed to the hospital. That was the end of her blue print archive. She never taught it again either. I had another alternative process master teacher, Todd Walker, who died of liver cancer. He named his various tumors after all the toxic processes he specialized in. Ammonium dichromate that we used to sensitize silk screens, gum prints, etc, can kill you quite quickly if you are exposed to strong dilutions of it. Itís deadly. Iím more than happy to say good bye forever to all that junk.  I canít even stomach the smell of fixer anymore.


quote author=nirpat89 link=topic=137397.msg1204717#msg1204717 date=1611010753]
No problem...been working a lot on learning cyanotypes lately so I familiarized myself with limits of this particular "cyanide" - no high heat (over 200C) and no concentrated strong acids like sulfuric, hydrochloric etc.  Same applies to potassium ferrOcyanide which is also found in traditional darkroom. 

An interesting case of someone who tried to commit suicide with a spoonful of potassium ferricyanide and lived:

https://www.tandfonline.com/doi/pdf/10.3109/15563659609013821
[/quote]
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