[Athiril]

For myself, if I were coating I would likely be targeting 120 size. Then the issue becomes a stable backing paper which doesn't interact with the film instead of how to punch holes.

For what is likely not going to be as good as Plus-X or FP4, I suspect a homemade emulsion would benefit greatly from the larger negative size.

Stable, chemically inert backing paper isn't so easy, however. About the cheapest I ever saw was the stuff on the Shanghai GP3 Chinese film. It seemed almost like children's construction paper. Then you have to print numbers which are chemically inert.

None of this is impossible, but it sure isn't trivial.

I agree, but why would you NEED to print numbers? In any case, the film sleeving etc we have here for uncut film up to 120 and also bigger sleeving for rolled large prints is outsourced to a local plastics company, you could get such things (backing paper) by local industry, with frame numbers.

The issue I see there is cutting the paper in the right place and attaching the film. And if there would be a feasible way to have the process of 120 somewhat semi-automated instead of one roll at a time by hand.

Except that it would fog the film!


Steve.

A laser is a collimated conherent beam, cutting would be done perpendicular. It would need a lot of particles to scatter off (such as steam or fog )