Okay Photo Engineer, let's take this further. What chemicals in printing inks react with film?
Most people might consider offset lithography, though I would have to imagine roto gravure as the printing choice for roll film backing paper. In roto gravure, the inks are almost instantly dry, meaning that in a multi-colour run, the next ink goes onto a dry surface of the previous ink; very different from offset in which a wet ink is applied to a nearly wet previous ink.
Seriously, I have tons of contacts in the printing industry. My guess is the problems are largely economic, since a high speed roto gravure press needs lots of runs to keep it profitable. If there are current backing papers with problems, that seems to me to be a quality control issue. How high tech can the ink and papers be when roll films have been around for decades, what is so special or proprietary that no other printing places can produce it?
There have also been many advances and changes in the paper industry. Many papers are now 80% to 98% opaque. There are also numerous sythetic papers now on the market too, though at a slightly higher cost than more traditional papers. There are also new UV inks, heatset inks, and other choices. It is possible today to make printed menus on none tearing paper that can resist grease, oil, food, and water, then be wiped clean for further continued usage, all without staining permanently.
I would gladly admit to being very wrong, but you have to give me very specific reasons why that is so. Obviously, some companies are currently printing the backing papers, unless it is for some odd reason only done in one place in the world, by one company, with a patent on some special ink.
There is an annual printing industry trade show that will be near me again in January/February time frame. I would be happy to field any set of parameters and specifications through the various paper companies to come up with viable alternatives to current processes. Given whatever information is needed, I can get quotes for Kodak, Fuji, Ilford or any other company that might want to know alternatives. There are large presses not running at capacity that would likely be happy to take work from the current companies that sound like they might not be interested in doing this roll film paper printing any more.
I enjoy reading the various contributions you have provided here at APUG. If there are specific materials that need to be avoided, or other aspects that need to be met, you can provide me a very specific set of guidelines. With your knowledge of chemistry, it should be simple (I hope) for you to draw up specifications.
As an alternative, what is your feeling on recycling these backing papers? The paper industry is very environmentally conscious, with many current papers coming from recycled post consumer waste paper.
Ciao!
Gordon Moat
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