Many thanks to everybody. After my last post I got my hands on another "new" Lomo (UPB-1A) and it actually works differently from the other "new" one: the lid comes on and off much more easily, there's a wider gap to leave liquid to fill the tank quickly, like in the "old" model. Now development comes even as expected.
So seems working tolerances were quite shabby. I think I'll follow Friedemann advice for the other tank: I'll rework the center of the bottom spiral a bit to keep less distance between it and the tank's bottom. About agitation (up and down or gently rotation) I think is more a matter of religion: I'm always have been of the up and down church, and I'm not concerned about light spill, since I work only with a dim red light in my darkroom, not directly over the tank. Just to let you know: the project we are working on had to start with Orwo UN54 stock, but since we weren't able to buy anything yet we started with the stock we had: double-x that we decided to unconventionally try as reversal (PQ-Universal + Permanganate bleach). It came not so bad, actually (after I solved the tank issues). Best Livio Il giorno gio 10 mar 2022 alle ore 09:15 Adrian Cousins < [email protected]> ha scritto: > I’ve had that issue with my first (used) UPB-1A but I think it was > possibly something to do with the smaller components - screw, spacer etc > coming from a different tank (possibly a previous version), I bought a > couple of brand new tanks and I’m able to move the spiral up and down as > well as rotate on both of them with no problems, the lids are slightly > loose so you can lift them up on one side to let air in, this allows you to > pour chems in and out quickly > > > On Wed, 9 Mar 2022 at 13:44, Ethan Berry <[email protected]> > wrote: > >> I have sometimes filled the tank through the drain hose using a funnel at >> the end of the hose. Drain it as you normally do. >> The "old" tanks that I have usually hold about 1,800 ml. I would guess >> that the "new" tank holds slightly less. >> If the spindle won't go up and down, perhaps spinning it would work for >> agitation. >> >> Ethan Berry >> ANYEYE Film Lab >> Montserrat College of Art >> 23 Essex Street, >> Beverly, MA 01915 >> >> >> >> On Wed, Mar 9, 2022 at 5:23 AM Ugo Bo <[email protected]> wrote: >> >>> Hallo everybody >>> >>> I've been happily using a 50ft Lomo tank for years, mine is the "old" >>> model (UPB-1 - version 1). Now a friends of mine bought the "new" >>> model (UPB-1A or version 2) and I'm teaching him how to use it. >>> >>> As some of you probably now, the "new" one has a lower body than the >>> "old" one (70mm against 78mm, here's the difference explained: >>> >>> https://sites.google.com/site/olexserviceskinor/processing-of-a-cine-film-in-home-laboratory/spiral-processing-tanks/upb-1-upb-1a-spiral-tanks?authuser=0 >>> ). >>> >>> In the past I processed only super8 also with a "new" model, and it >>> worked fine, but now, processing 16mm, I realized that a problem >>> arises: the "new" one leaves a very tiny room for liquid to pass, so >>> it takes a very long time to fill the tank, a problem that I never >>> experienced with my "old" one. Long filling time makes developement >>> uneven. >>> >>> When processing 2 x 16mm the problem is even worse: the gap is really >>> thin, liquid takes ages to enter, and is also impossible to move the >>> spiral up and down (my way of agitation). >>> >>> I thought of filling the tank first with liquid, and then dropping the >>> spiral in the dark in the liquid, but is quite an hassle. >>> >>> Did you have the same issue? And what's your trick? >>> >>> Best >>> Livio >>> _______________________________________________ >>> Forum mailing list >>> [email protected] >>> https://filmlabs.org/cgi-bin/mailman/listinfo/forum >>> >> _______________________________________________ >> Forum mailing list >> [email protected] >> https://filmlabs.org/cgi-bin/mailman/listinfo/forum >> > _______________________________________________ > Forum mailing list > [email protected] > https://filmlabs.org/cgi-bin/mailman/listinfo/forum >
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