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Agfa Scala homeprocessing


In an article in the German magazine Foto & Labor (2/95) it says that the Agfa B&W slidefilm (code ATM-R-320) CAN be developed in normal (home)processing:
Apparently, the Tetenal reversing kit gives almost the same result as the Agfa process itself; some spec's:
(current Agfa is 'ATM', former Agfa B&W slidefilm is 'Dia Direct'; also listed for comparison: Ilford Pan F Plus in Tetenal, and Agfa APX 100 in Tetenal) 



             ATM &           ATM &          Dia Direct    Pan F    APX 100 
          Tetenal-kit    Agfa processing      Tetenal    Tetenal   Tetenal 

Dmin         0.09           0.08               0.23        0.30     0.24 

Dmax         2.20           2.36               2.00        3.98     2.30 

EI (DIN)       21             21                 12          18       23 

Gamma         1.1            1.2                0.8         1.8      1.0 

first          10             ?                   3          15       13 
development 
time (min)
The article further mentiones an extreme low 'Schleierwert' of 0.10 for the Agfa ATM, were as the other films only achieve 0.25 at their very best. I am not quite sure what a good translation for this German 'Schleierwert' is, but it is something that is very much appreciated in projection use, and 'gives the other films a dull look, compared to the ATM'. Perhaps 'light-diffusion-factor' is the appropriate term. Apparently this is achieved by skipping the grey color/dye out of the acetat-carrier (sp?), so that the carrier is more transparent. The article mentiones that this is the big advantage of Scala over normal negative films used in reversal processing.

Another note in Foto Brenner's quarterly magazine (German) says a first developer time of 8 minutes, instead of the above 10. YMMOMNV.



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