I have finally acquired some of this chemical, and then have had time to use it. It cost a few dollars but i think it will be worth it.
It is supposed to give a nice brown tone. Which it does. Also everything I have been able to find say it is naturally an antifogging developer. Thought I would try it on some old Ektalure 1965,I was going to throw out because there was nothing I could do to not have it fog. With this developing agent not a bit of fog. I was shocked, the brown tone was nice. Not quite as nice as poly-sulfide toning, but better then any other warm tone developer that I have used. I then used it on some 1931 AZO that I couldn't get to work either. This developer did not fog at all. although it had to sit in the soup for 4 minutes.
I had to buy the chemicals from ACROS through a local chemical company. Ended up being $75 for 100grams. I bought all 300 grams they had.
I do a lot of printing on paper more then 50years old, some as old as 100years. Most is usable, I am hoping to not have to use so much Kbr or Benzo which decreases the contrast. When used on some 1945 Velox it seemed to not have lost any contrast. It will take more experimenting to find out.
Randy |