Atomal/Calbe A49 - Successful clone.

Last month I was make some experiment with different formulas like Atomal/Calbe A49. I use CD-1 because it available in my country. I'm really impressed with results. Some samples:

CD-1 + Ascorbate + Kodalk, Ilford HP5+ @400





CD-1 + Hydroquinone + Borax, Ilford HP5+ @400

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I did some test with a CD too. Ortho Phenylene Diamine like in the W665 formulae. However here you have a speed loss of 1F stop. But the result is very fine grain. The interesting about your A49 and Ascorbate is the film speed: Still E.I. 400 with that HP5+ ?

Fomapan Creative 200 (135-36) in W665 E.I. 100

With hydroquinone it may be like Adox Adolux ATM 49 but interesting to see that it works with ascorbate as well.It would be interesting to know your formula.
http://www.digitaltruth.com/products/msds/Adox_ATM49_MSDS.pdf

ascorbate version:
Sodium Sulfite 60g
CD-1 2g
Sodium Ascorbate 5g
Kodalk 7g
Water 1l

CD/Q version:
Sodium Sulfite 100g
CD-1 5g
Hydroquinone 6g
Borax 6g
Boric Acid 4g
Water 1l

Michael R 1974 said:

Thanks for posting this. Have you tried these with a slower film like FP4 or Pan F?

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no. but I think that result will be very-very good

It seems the new name for the commercial product is Adox Atomal 49:
http://www.adox.de/english/
It is available in the US EU and UK at least.
You made a good piece of research but CD-1 is not available everywhere.
btw the msds for ATM 49 appears different from the original Atomal formula which is as quoted in this thread:
http://www.photography-forums.com/agfa-atomal-formula-t93449p2.html

Alan Johnson said:

You made a good piece of research but CD-1 is not available everywhere.
btw the msds for ATM 49 appears different from the original Atomal formula which is as quoted in this thread:
http://www.photography-forums.com/agfa-atomal-formula-t93449p2.html

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N-Hydroxyethyl-o-aminophenol used in original Atomal isn't available anywhere.

Calbe A-49 uses as developing agents:
N-N-diethyl-1,4-phenylendiammoniumsulfate = Kodak CD1 and
Hyroquinone

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CD-1 is N,N-Diethyl-p-phenylenediamine sulfate, CAS: 6283-63-2. its still available.
CD-1 can be substituted (and I really substitute it) with N,N-Diethyl-p-phenylenediamine Hydrochloride, CAS: 2198-58-5 (also available).
CD-1 also can changed to CD-2 - N, N-bis (2-hydroxyethyl)-p-phenylene diamine Sulfate (CAS: 4327-84-8), but CD-2 need in 1.5-1.8 times more
you can try to use CD-3 or CD-4. can't test it because not available in my country

One day it would be an interesting experiment to try to make something like original Atomal ,replacing oxyethyl o aminophenol by p-aminophenol hydrochloride,maybe.