Based on many years of experience with ORWO UN54 and my own tests with GP3 100 135, I can confirm that GP3 100 is identical to UN54.
In the 120 / 220 format I have discovered that GP3 100 is not UN54. The films I purchased are FOMA 100 material.
I did read somewhere that someone claimed the GP3 100 was actually Foma 100.
Yes, I was sure the 100 in 120 that I had used wasn't any Foma product. Koraks, in what way did it age badly? Was it a mold/fungus type problem or something else that showed up after development? I will have to check a partial box of 4X5 that I have stored in the fridge. Should tell me how it stores cold since it's been in there for about 9 months now.When it comes to sheet film, the only thing I do know is that the Shanghai GP3 100 that I got a year or two ago was most definitely not Fomapan 100. I don't know what it was, except that it aged horribly badly and an opened box became unusable within a couple of months, possibly (bit this is a bit of a wild guess) due to an interaction between the film and the sheets of interleave paper it was stored with.
I've not tried Shanghai 100 in 35mm or 120 format; only that single box of 4x5", which will remain a one-time experiment.
My golly, that is very strange. I check my stash right away, but in the next couple of days I'll take a couple of shot with my cool stored GP3 and see what I have. That will determine whether or not I buy anymore GP3 sheet film. Korea's, was yours cold stored?The failure mode was very peculiar; the film only created some sort of strong dichroic fog and virtually no image density. I've never seen anything like it. If memory serves, the processed negatives looked a little tan with locally an iridiscent shine to them. I may still have one in a folder somewhere, but I'd have to do some rooting around.
Well, we'll see how mine fairs after being stored cold.No, mine was stored at room temperature, but in a dry place. Film from other manufacturers stored in the same way and for longer periods of time has always performed just fine.
That's not good to hear at all. I'm just starting to put my refinished 8X10 camera back together and was considering GP3 100 in 8X10 since it's a dirt-cheap 8X10 sheet film. Looks like it will be Foma 100 now.My fresh pack of 3x4 Shanghai GP3 has mottling in the shadows, probably due to the paper in between sheet film. Quite disappointing, since that is the only 3x4 fresh film I can find. I guess it will be a one-pack experiment for me as well, life is too short for unpredictable quality.
Whoa, that is something! I'm not much into the water color filter thing myself so I'm going to stay away from this stuff until the bugs crawl out of it.A few photos with the prominent mottling in recent fresh GP3 3x4 sheets. The film was very under-exposed, thus accentuates the problem. If I were optimistic, it gives a "watercolor" filter for free. ;-)
Violin leaning on window - LF3x4_004 by Zheng, on Flickr
Hand painted - LF3x4_005 by Zheng, on Flickr
Tuning peg - LF3x4_006 by Zheng, on Flickr
Whoa, that is something! I'm not much into the water color filter thing myself so I'm going to stay away from this stuff until the bugs crawl out of it.
Well, it's still bad enough to scare me off. Tomorrow is supposed to be nice a fairly sunny here (we'll see?) so I'm going to load two sheets of GP3 tonight and ready them for the morning sunshine. I'll see if my cool stored GP3 has mottling or not.To be fair, this is very under-exposed negative. But I have another set of photos in bright daylight, and the shadows still have mottling visible.
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