Handling Lith/Litho Film
Recently I bought some Arista Ortho Lith Film from Freestyle, the 4x5 sheets. I'm exposing these in camera -- either in my homemade large format camera, or cutting the sheets into 2.5 inch squares for medium format. What I'm finding (and confirming with my reading) is that it's very easy to scratch or otherwise damage this film during processing. I'm using trays and developing by inspection.
The rubber tip tongs I have seem to be the worst possible thing; when I saw the imprint from the rubber on one of my negatives, I knew what was going on. I thought I could use tweezers and handle the medium format negatives at the edges (they have a border) but that didn't go so well either. I would try plastic or rubber gloves, but I worry about cross contamination.
Any ideas? My workflow is a prewet/presoak, developer, water stop, fix, Photoflo. Is the film more easily damaged at one particular stage of the workflow?
I would use the latex medical gloves as they are thin and it's easier to grip with them. Just wash them after you drop the neg into the water stop and developer won't contaminate the fix.
I use these gloves for processing larger size FB prints and just keep washing them. Or use one hand for developer and one for the fix.
I've often wondered if you could use the old "Hardener" in the fixer with lith film. That might protect it in the wash and later.
I have used the older Arista II 8x10 lith film as well as ultrafine's lith film offering. They both are fine in tray development, even with rubber tipped tongs. These were developed in smooth bottom 11x14 trays, does your tray have ridges in the bottom? that could be a source of scratches too.
I've used the purple nitrile gloves with Arista ortho lith (the older version, not the most recent) and handled by the corners carefully. You wouldn't get contamination from the gloves, but they could do the same as the tongs if you grab too hard. At least with gloves you can tell how hard you're grabbing - that's the tough part with tongs.
Thanks everyone. So with latex or nitrile gloves, a good rinse is enough to avoid cross contamination?
The gloves are designed to be used with chemicals; just get unpowdered and you should be fine. If you mean after going through the chemicals once, I personally would ditch that glove and use a fresh one for each pass of dev-stop-fix.
that's a lot of gloves!
Wow. That's going through a lot of gloves! Seriously, I would use your left hand to put and take out the negative from the developer and then the right with the fixer. It's those two baths that you really have to worry about. And then just rinse your gloved hand in between.
Originally Posted by winger
It seems to me the biggest issus is fix getting into the developer?
Sorry, I worked in a lab - the only way to know a glove is clean is to use a fresh one. I've just never counted on a rinsed glove to be free of chemicals. Yes, having fix on the glove and then touching an undeveloped sheet would cause that spot to not develop. Also, I use a kitchen LCD timer to time the chemicals and need a clean hand for that (also a lab holdover - I don't touch non-chemical things with a gloved hand). I may go farther than necessary, but that's like "over-engineering" - no such thing. :)
Originally Posted by davido
You just get TEXTURED, NON-POWDERED disposable nitrile gloves of appropriate size. One time use. Dirt cheap, available almost anywehre. Anyone who doesn't use gloves in relation to chemicals in this day and age is a bit nuts as far as I'm concerned. Tongs are for removing tonsils.