Recent content by FredK

As someone who worked on the K-200 & K-100 & K-400 program back in 1986, where only one K-200 was commercialized, I'll throw my hat into this ring as to why Kodachrome was still around to the near end. But first, Alan, all silver halide is sensitive to blue light, even when dye sensitized to a...

Building 58 was torn down by wrecking ball and not imploded due to its proximity to the coating machines in Building 29 & Building 38. Imagine 400+ perforators all running and vibrating at slightly different levels. There were times when they would seem to fall in step and the vibrations were...

Late to this thread but I had to answer issac7. A typical roll of VISION3 Color Negative will yield around 460 units at 400 ft. There still is sufficient volume for those films that the company can profitably produce that many in a given production run, but please remember a production run...

The film's base is supposed to be totally inert so that fogging of any such does not occur. That said, any impurities within the gel-sub layer applied to the base for emulsion adhesion could lead to long-term fogging issues. The suppliers of the materials used for gel-sub must test for trace...

I'm not an expert in the 105mm film manufactered in Rochester, but I did have a time going through the perforators (two) which came into my building for rebuilding back in the late '80's. I believe that 105mm film was used by Aerial and Industrial Imaging and was used in Aerial cameras where...

As one who worked in the 35mm slitting and perforating factory in Rochester, nearly all motion picture stocks with Bell-Howell perforations would have edgeprint. There is one single dot in between perforations under the 3rd frame of the picture, but the slitter repeat, Kodak, would requiore...

"I stopped reading after 5 sentences. The author of the article is so fundamentally confused about literally everything going on that the article ends up in a chaotic mishmash that's downright idiotic." Well said Koraks. I stopped after one sentence. Acetate manufacturing ended in June of...

One possibility is what is called developer carry-over in larger roller transport processing machines where developer - still working - is not uniformly squeegeed off the film prior to going up over the carry-over rollers and down into the next bath. Some films are far more prone to this issue...

The high magnification certainly looks like reticulation to me. I'm not too familiar with EIR in manufacturing other than in my very early days in 35mm slitting and perforating in the mid-80's, but those issues are not pertinent to those of reticulation. I do know though, that the film had...

Koraks asked me to chime in on this thread. Relative to the design of Gold 100, the latent image electron/photon traps are strong enough for the film to not go totally black over that time period, so I can't fault the film itself. The tape that holds the film to the core would have to have...

120 film is not perforated. Thus, I am assuming that this is 65mm film that someone or you purchased and is marrying up with some sort of backing paper and winding into very tight rolls. What you are seeing is pressure banding formed because within the ECN film are subtle height differences...

Joerg, have you contacted representatives from Kodak Alaris with this concern? You should be sharing your images with them as well as your experience. Back with Kodachrome 200, the flat t-grains would pressurize across the 37th frame that would only appear as a pinkish line in sky scenes...

Yes, Koraks has this correct! Very heavily fogged film may require longer fixing to remove all of the developed silver because the fixer, at the micro level, becomes extinguished and requires more fresh chemistry to react with all the silver. If you are collecting your silver, re-fixing should...

Kodak Safety Film 5035 was Kodacolor II was manufactured from 1973 through 1977 with a film speed of ASA 80. In 1977, Kodak Safety Film 5075 replaced 5035 as Kodacolor II with a true ASA 100 speed film, and was manufactured until 1983 when it was replaced with Kodacolor VR 100 (product code 5094).

The method of pre-soaking can assist in reducing some issues and especially those with the films are not all T-grains. All of the mechanisms you mention are or were in play and all of the color and black and white films behaved differently. For those that were desensitized or sensitized...