Pyrocat-HD 4x5 TMX100 Jobo 75f Starting Time

[Peter De Smidt]

I'd like to develop 4x5 TMX 100 in a Jobo processor at 75F. I will be aiming for the appropriate contrast to print with a diffusion enlarger on grade 2 (i.e. not VC paper) silver-gelatin paper. Does anyone have a recommended starting time? I'm using the Pyrocat-HD in glycol kit from the Photographer's Formulary. Yes, I've done some searching on the web, and I've sent out some email queries, but I haven't heard back.

 

[sanking]

I'd like to develop 4x5 TMX 100 in a Jobo processor at 75F. I will be aiming for the appropriate contrast to print with a diffusion enlarger on grade 2 (i.e. not VC paper) silver-gelatin paper. Does anyone have a recommended starting time? I'm using the Pyrocat-HD in glycol kit from the Photographer's Formulary. Yes, I've done some searching on the web, and I've sent out some email queries, but I haven't heard back.

Peter,

I would suggest the 2:2:100 dilution of Pyrocat-HD, and 11:30 minutes of develoment at 70F. That will give you an approximate CI of around .62-.65 which should print well with a diffusion enlarger on Grade 2 paper. This time and dilution worked well for me with TMAX-100 and Ilford Galerie FB 2 in some recent printing tests.

Sandy

 

[Peter De Smidt]

Thanks Sandy. Off-hand, does anyone know the adjustment for temperture? I like to process at 75F, because that's always warmer than the ambient temp in my darkroom.