• Welcome to Photrio!
    Registration is fast and free. Join today to unlock search, see fewer ads, and access all forum features.
    Click here to sign up

1933 US Dept of Commerce - "Comparison of Several Developers..." PDF

I’m not too sure how useful, to me at least, but very interesting. I love this kind of historical stuff. Thanks, Kino.
 
Thanks. I just read this morning about the 1930 advice to use a “single reducer” developer instead of “metal-hydroqinine” combination. In this paper it shows you get about a third stop more speed with the MQ developer, but if you add bromide you lose about a stop and a third.
 
Yeah, thanks for posting this. I too love this historic stuff. This is quite interesting.
 
Some forgotten info there.
Metol-hydroquinone can be replaced by p-aminophenol-hydroquinone
Sulfite-p-aminophenol deposits crystals of p-aminophenolate not sulfite , of interest with PaRodinal which slowly deposits crystals.
 
Some forgotten info there.
Metol-hydroquinone can be replaced by p-aminophenol-hydroquinone
Sulfite-p-aminophenol deposits crystals of p-aminophenolate not sulfite , of interest with PaRodinal which slowly deposits crystals.
 
Some forgotten info there.
Metol-hydroquinone can be replaced by p-aminophenol-hydroquinone
Sulfite-p-aminophenol deposits crystals of p-aminophenolate not sulfite , of interest with PaRodinal which slowly deposits crystals.
 
You must log in or register to reply here.
Menu
Log in
Register