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#21
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Did I mess up big time? (Ilford MC filtering)
"Nicholas O. Lindan" wrote in message ... "Richard Knoppow" wrote I used to ferrotype frequently many years ago but have had trouble with modern papers, perhaps the emulsion is too hard. That's good to know - I haven't been able to get a good ferrotype finish - and I was blaming it on the modern me. -- Nicholas O. Lindan, Cleveland, Ohio Darkroom Automation: F-Stop Timers, Enlarging Meters http://www.darkroomautomation.com/index.htm n o lindan at ix dot netcom dot com I'm not sure what the problem is. When I first took up photography seriously in the mid 1950's I did a lot of ferrotyping mainly because the print dried fast. I used chromium plates with a bright mirror finish. The prints were soaked in wetting agent for a few minutes and put on the plates sopping wet as the instructions required. I don't remember what sort of squeegee I used and I don't think it matters. I got pretty good results consistently. My more recent attempts have not been so good. Mostly problems with small areas of the print not sticking to the plate. I think this is partly the quality of the plates but am not sure. Chrome plates must be absolutely clean adn free of any oil. Since even very small particals under the print can cause a gap in the finish its probably worth sponging off the surface and dipping it again in the wetting agent. When they work right the prints will just pop off the plate when dry and have a perfectly uniform finish as glossy as RC glossy. The finish of the plate is very important because it is essentially molded into the surface of the paper. Some years ago I bought a couple of plates which I found had a sort of dull chrome finish. Of course, the print surface is the same, a sort of dull gloss. It takes a very even mirror finish to make good ferrotype surfaces. Since I can get very good glossy surfaces from RC paper when I want that finish the discussion is sort of academic but I still like to be able to make processes work right. A note: I've tried a few times in the past to use glass for ferrotyping. Glass must be properly waxed or the prints will stick and can't be removed without destroying them. I did get a sheet of glass so that the prints didn't stick but the finish was not very good. I know this process can be done but have never been successful. I tried it years ago because I simply couldn't afford proper ferrotype plates at the time. -- --- Richard Knoppow Los Angeles, CA, USA |
#22
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Did I mess up big time? (Ilford MC filtering)
In article ,
Richard Knoppow wrote: Since I can get very good glossy surfaces from RC paper when I want that finish the discussion is sort of academic but I still like to be able to make processes work right. Aren't those big drum dryers for FB paper which everyone uses with the emulsion facing the canvas these days really meant for ferrotyping with the emulsion facing the drum? We had several at Tisch (I have never cared for them since the canvas gets dirty and spreads contaminants to other prints) one of which was seldom switched on, gleamed a bit more brightly from the drum than the others, and was marked "Ferrotype -- emulsion side DOWN only". I tried it once and it did seem to produce the advertised results... -- Thor Lancelot Simon "The inconsistency is startling, though admittedly, if consistency is to be abandoned or transcended, there is no problem." - Noam Chomsky |
#23
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Did I mess up big time? (Ilford MC filtering)
"Thor Lancelot Simon" wrote in message ... In article , Richard Knoppow wrote: Since I can get very good glossy surfaces from RC paper when I want that finish the discussion is sort of academic but I still like to be able to make processes work right. Aren't those big drum dryers for FB paper which everyone uses with the emulsion facing the canvas these days really meant for ferrotyping with the emulsion facing the drum? We had several at Tisch (I have never cared for them since the canvas gets dirty and spreads contaminants to other prints) one of which was seldom switched on, gleamed a bit more brightly from the drum than the others, and was marked "Ferrotype -- emulsion side DOWN only". I tried it once and it did seem to produce the advertised results... -- Thor Lancelot Simon Yes, these large dryers were meant to operate continuously on a photofinishing line although there were smaller ones for home darkrooms. The large ones were available with gas heat as well as electric. The manufacturers of these things also supplied a post washing treatment for the paper. I think this was mainly a wetting agent. The chrome must be absolutely perfect for the finish to be good. As you say the paper is put in the dryer with the emulsion side against the drum for glossy and with the support side against the drum for matte finish. If the prints are well washed the canvas will not pick up much of anything but they should be cleaned every so often. Its interesting just how good the finish quality of "drugstore" photofinished print was. The longevity varies all over the place because some plants were careful about fixing and washing and some were not. Since very small amounts of residual hypo can reduce oxidation of image silver these prints may actually have been more stable and long lived than those given "archival" processing. -- --- Richard Knoppow Los Angeles, CA, USA |
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