stavros_vogiatzis Posted August 26, 2003 Share Posted August 26, 2003 Greetings,Has anyone used the Beutler formula in combination with continues agitation ?? If so, what would be a good starting point for Delta 100 and the AGFA APX 100. Million thanksStavros Link to comment Share on other sites More sharing options...
lex_jenkins Posted August 26, 2003 Share Posted August 26, 2003 Tetenal's Neofin developers are *reportedly* Beutler type developers. Here are a few examples for recommended times with Neofin Blau: APX 100 (to a contrast index of 0.55), 9 minutes with continuous agitation (every 3 seconds); 14 minutes agitating every minute. Delta 100, 4 minutes with continuous agitation; 7 minutes agitating every minute. Take those only as examples of how to apply the developer. In my older book which has recipes for Beutler developers there are *no* specific recommendations for use, only suggestions for a range of times and temperatures. Only experience will determine what works best for you. Link to comment Share on other sites More sharing options...
richard_urmonas Posted August 26, 2003 Share Posted August 26, 2003 I have experimented with Beutler developer in a Jobo machine. Results are good, but I have not had a chance to finalise my tests. Sorry, I have not used either of the films you mention, so cannot give times. Link to comment Share on other sites More sharing options...
ken_schroeder Posted August 26, 2003 Share Posted August 26, 2003 I'm curious, Stravos, why would you want to use the Beutler formula with continuous agitation? The Beutler formula is designed to work as a semi-compensating developer. The resting (non agitation) period gives the developer a chance to work on developing the shadow area without burning out the highlights. Personally, I like lots of soft shadow detail without having harsh highlights. That's just a mater of taste, not a rule. Link to comment Share on other sites More sharing options...
lex_jenkins Posted August 26, 2003 Share Posted August 26, 2003 According to the research I've done the reason for continuous, or at least frequent, agitation with Beutler developers is to minimize the risk of local exhaustion. Reportedly these developers become exhausted very quickly at the emulsion with the risk of uneven development. That's why they're considered tricky to use. A balance must be found between agitating enough to avoid local exhaustion while preserving the vaunted adjacency effects. Apparently mindful of these differing needs, Tetenal has provided different times to achieve not only different contrast indices but to accomodate different agitation techniques as well. Link to comment Share on other sites More sharing options...
stavros_vogiatzis Posted August 27, 2003 Author Share Posted August 27, 2003 Thank you for the answers every one. Ken, as I leave in Greece, with its long summers, it is very hard to work in the dark room, which at present has 31 C. Therefore the JOBO method in very convenient and also saves me water. You are very right about the highlights, this is something that I have started to work out slowly. I like acutance developers over fine grain and I think the �old� formulas have a better �character� then the new stuff that sometimes looks like plastic. Best regardsStavros Link to comment Share on other sites More sharing options...
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