Archived posting to the Leica Users Group, 2000/10/31
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Ken, I would think you'd want more than 1/4" thickness for the sides, esp. the large sides, which could bulge out under the weight of the chemicals, and maybe a larger base to be steadier. How wide is each slot in the Jobo? Maybe wider for the fixer bath in case you like to have more than one print in the fixer. Tom - ----- Original Message ----- From: <ken@iisaka.org> To: <leica-users@mejac.palo-alto.ca.us> Sent: Tuesday, October 31, 2000 12:52 PM Subject: Re: [Leica] Re: JOBO Nova black-and-white processor > Tom, > > Thanks for the pointer. I will look through TAP Plastics' on-line catalogue, and draw a plan for a 16x20" or 20x24" processor. I figure that each of the baths should be at least 18x22x0.5" and 22x26x0.5" respectively. That will hold about 3200/4700 millilitre of chemicals, about the same as Nova. It would be desirable to make the openings of each baths a little wider like Nova, but I think that is critical only for the developer bath. The whole assembly will hold nearly 13/19 litre of chemicals, so it needs to be sturdy. I have reservations about simply using the light diffuser to separate the baths: when filling and emptying, there may be too much stress placed on the dividers. Still, their Prismatic Panel in the 0.15" thickness may be a good candidate. I suspect that the texture is on only one side, so epoxying two back-to-back will probably work. You then need four sturdy PVC boards for the four sides, and one for the bottom. So you need: > > 20x24" processor: > > 8 Prismatic Panels, 22x26x0.15" > 2 PVC boards: 3.7x22.5x0.25" > 2 PVC boards: 22.5"x26.5"x0.25" > 1 PVC board: 3.7x26.5" > > 16x20" processor: > > 8 Primsmatic Panels, 18x22x0.15" > 2 PVC boards: 3.7x18.5x0.25" > 2 PVC boards: 18.5x22.5x0.25" > 1 PVC board: 3.7x22.5" > > Much sanding and smoothing would be needed at the top of the dividers, too. > > On Tue, 31 October 2000, "Tom Schofield" wrote: > > > > I think he is talking about the trasparent monochrome processors. I am > > thinking about seeing if I can build a 16x20 or 20x24 monochrome processor. > > A trip to TAP Plastics may get almost everything. It appears from the > > pictures that the dividers are a lexan material similar to that used in the > > better quality ceiling mounted flourescent light fixtures, in the prism > > style which would keep the print from sticking to the edges. That and a few > > pieces of plexiglass, say 1/2 or 3/4" thick, grooved for the dividers to > > slide in. TAP Plastics would be happy to advise what materials are chemical > > resistant, I'm sure. You could probably have TAP manufacture it for you, > > for a price. Question is what to use for a drain (besides a syphon hose!). > > If any others are interested in collaborating on a DIY project, please let > > me know. > > > > As an aside, their catalog has plans for light boxes. > > > > Tom > > > > ----- Original Message ----- > > From: "Jim Brick" <jim@brick.org> > > To: <leica-users@mejac.palo-alto.ca.us>; <leica-users@mejac.palo-alto.ca.us> > > Sent: Monday, October 30, 2000 4:25 PM > > Subject: [Leica] Re: JOBO Nova black-and-white processor > > > > > > > At 10:42 PM 11/25/00 -0800, Ken Iisaka wrote: > > > > > > > >Too bad it only comes in 8x10 and 12x16. If available in 16x20, I'd buy > > one > > > >now. Monday is my 32nd birthday. (I bought 8x10 Quad for my birthday > > last > > > >year.) > > > > > > > > > > Nova print processors come in sizes up to 20x24. Go to: > > > > > > http://www.novadarkroom.com/printprocspec.htm > > > > > > To see the models and sizes. > >