Bill Burk Subscriber Joined Feb 9, 2010 Messages 9,310 Format 4x5 Format Saturday at 11:40 AM #126 Wolfram Malukker said: Hydroquinione is a "dangerous chemical" and is "restricted for transport" because of it's toxicity to aquatic life, NOT necessarily human life. It's because when you spill it into a lake, it kills *everything*. Not because it kills *you*. Click to expand... NIH has a nice write up about it. Mentions catechol so I guess other developing agents like Pyro may also raise the same concerns.
Wolfram Malukker said: Hydroquinione is a "dangerous chemical" and is "restricted for transport" because of it's toxicity to aquatic life, NOT necessarily human life. It's because when you spill it into a lake, it kills *everything*. Not because it kills *you*. Click to expand... NIH has a nice write up about it. Mentions catechol so I guess other developing agents like Pyro may also raise the same concerns.
Bill Burk Subscriber Joined Feb 9, 2010 Messages 9,310 Format 4x5 Format Saturday at 11:48 AM #127 Mallinckrodt Chemical Works - The Chemistry of Photography - 1940 A little sulfite. “it is general practice”. So I guess this has been known more than a hundred years.
Mallinckrodt Chemical Works - The Chemistry of Photography - 1940 A little sulfite. “it is general practice”. So I guess this has been known more than a hundred years.