phil sweeney
28-Aug-2005, 11:40
I'd like to pickup a unicolor print drum and motor, for 8 x 10 film dev. I have read most of the posts and threads on the subject and still have a couple of questions. Though the print drum is preferred, can the film drums be used (including the cibachrome drums etc)? I am aware one could back the film with fiberglass screen etc.
I will probably use pyrocat, but I use ABC also. I understand that rollopyro is some variation on ABC? On solution and dilutions: I recently developed, in tray, a few negatives in WD2D exposed from a step tablet, for test purposes. On one occasion using less total solution than normal I noticed excessive stain and could see the developer was darker than normal at the end. I believe this is described as oxidation of the developer? I have seen this in tube development for all the pyro developers and therefore do not use tubes. A repeated test did show expected minimum stain with more volume at the same dilution. I know excessive agitation should be avoided but can see that more solution does combat the problem. I have found ABC does not discolor as much.
I would like to know if anyone has more knowledge on using more solution than the minimums recommended in rotary processing?
Though I have no tray processing problems I am looking to have a tighter control on negatives for alt printing and believe drum processing can achieve that.
I will probably use pyrocat, but I use ABC also. I understand that rollopyro is some variation on ABC? On solution and dilutions: I recently developed, in tray, a few negatives in WD2D exposed from a step tablet, for test purposes. On one occasion using less total solution than normal I noticed excessive stain and could see the developer was darker than normal at the end. I believe this is described as oxidation of the developer? I have seen this in tube development for all the pyro developers and therefore do not use tubes. A repeated test did show expected minimum stain with more volume at the same dilution. I know excessive agitation should be avoided but can see that more solution does combat the problem. I have found ABC does not discolor as much.
I would like to know if anyone has more knowledge on using more solution than the minimums recommended in rotary processing?
Though I have no tray processing problems I am looking to have a tighter control on negatives for alt printing and believe drum processing can achieve that.