Bruce (Camclicker) said:I've used Pan F (35mm @ 25) with D76 recently and while the results were fine, they were just fine. Next time I will try Neofin Blu (Buelers ) or just make life simple and use Rodinal - always a winner, even good on toast.
HMMMMMM, you pique my interest.... My thought was Beutlers might provide acutance to 35mm enlargements that may be lost with Rodinal.Ole said:I think you might be surprised at the difference between Beutler's Acutance Developer and Rodinal.
I was, and I know which of the two I'll use for 35mm and MF where grain size matters!
Roger Hicks said:This is probably the finest grained general-application film on the market today, though not the sharpest: Delta 100 beats it in almost all developers. Which developer you use will affect grain size and sharpness. With the right exposure it will stand up to almost anything, including Rodinal. Exposure is however far more critical than with many faster films: +2/3, -1/3 will make a difference, and true ISO can range from around 25 to little short of 100 while personal EI can go further.
Cheers,
Roger (www.rogerandfrances.com)
kb244 said:Hrm I seem to differ when it comes to Delta 100.
Interestingly the Neofin Blue MSDS of 7/4/2003 lists both Metol and Phenidone with potassium carbonate rather than sodium carbonate. This is in contrast with the typical Beutler formula which uses only Metol as the developing agent and also uses sodium carbonate.I've used Pan F (35mm @ 25) with D76 recently and while the results were fine, they were just fine. Next time I will try Neofin Blu (Buelers ) or just make life simple and use Rodinal - always a winner, even good on toast.
Interestingly the Neofin Blue MSDS of 7/4/2003 lists both Metol and Phenidone with potassium carbonate rather than sodium carbonate. This is in contrast with the typical Beutler formula which uses only Metol as the developing agent and also uses sodium carbonate.
Rodinal is not a particularly good acutance developer. Most acutance developers contain Metol because of the unique properties of this developing agent. For an acutance developer, the developing agent must be sensitive to bromide concentration but not too sensitive.
Sorry, I did not mean to imply that the stock solutions contained bromide but meant that acutance developers in general depend on the local buildup of bromide in the emulsion to restrain development. This bromide is released by the emulsion during development. It is this restraining action in part that is responsible for the edge effectsThere is no Bromide in either Part A or Part B.
Based upon the Massive Development Chart I selected a ratio of 1+1+10 for 8min. at 68-F. Next time I will try 1+1+8 and then try 10 minutes if necessary.
Beutler's HD #105 is my developer of choice for 35mm slow films - right now.
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