130 Developer Shelf Life

[seadrive]

Hi guys and gals,

I found a box of 130 Paper Developer from Photographer's Formulary. I probably bought it about 3-4 years ago. The box is unopened, still shrink-wrapped.

Is this stuff still okay to use?

TIA!

Steve

 

[doughowk]

The glycin may be problematic - see glycin developer

 

[seadrive]

"glycin is not particularly toxic, but it does have a relatively short shelf life. When fresh, glycin appears as a glistening white or gray powder. As it ages, it turns brown and loses its potency."

Hmmm... the glycin in my package is a medium-dark brown, so I guess I'll need to get some fresh stuff.

Thanks!

 

[Jim Edmond]

You may be able to purchase the correct amount of glycin from the formulary, and use the rest of your package.

 

[PhotoJim]

Jim is absolutely right, except that you *will* be able to use the rest of the ingredients.

Incidentally, once mixed, 130 is very durable. I've used 2-year-old stock solution and gotten good results. The stock solution lasts much longer than glycin powder does.

 

[Moopheus]

Incidentally, once mixed, 130 is very durable.

That's good to know--I'm reassembling my darkroom after moving and not doing any work for a few months, and I have a fair bit of PF 130 stock left.

 

[Mark Layne]

The glycin may be problematic - see glycin developer

Or-it may not be a problem

 

[seadrive]

Thank you, all!

Off to visit the Formulary...