• 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

Developer question for PE and others

half stop lighter er.jpg

A
half stop lighter er.jpg

  • jhw
  • Jan 12, 2026
  • 8
  • 7
  • 110
sentinels of the door

A
sentinels of the door

  • 4
  • 0
  • 91

Recent Classifieds

Forum statistics

Threads
201,718
Messages
2,829,041
Members
100,909
Latest member
SuninPisces
Recent bookmarks
1

Photo Engineer

Subscriber
Allowing Ads
Joined
Apr 19, 2005
Messages
29,018
Location
Rochester, NY
Format
Multi Format
In den Begiebezustatze ist Borax-Ersatz je nach Saure bestimmung oder Borax mit Natrium Carbonate.

During the war, Agfa could not get Borax from the US easily so they made a substitute. This quote above is directly from what I copied from an Agfa formula many years ago. It was published (AFAIK) in the FIAT reports.

I hope I got that right.

PE

My quote is incorrect above due to my poor rememberance of German. The exact information was on two pages and I had to combine the two.

Basically, they used Ersatz Borax or acid to adjust pH in solutions and the ersatz Borax was made from Sodium Carbonate and Bicarbonate or with Sodium Bicarbonate and Sodium Hydroxide. The acid used depended on the solution being adjusted.

I looked up my notes again today to see if I could clarify this and use English which is a bit better than my German.

PE
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom