J&C Sheet Film Developing Tube

Mike,
I'm so pleased you like these tubes! I find that all I really need is 250-300ml of chemistry for even development. I think you're using allot more than you really need to. Good Luck.

 

Mike, I also did this two weekends ago and then this weekend. Using 5x7 negatives, one word of caution, when I tried two weekends ago, used Rodinal 1+100, filled the tube to the top (about 1300 ml) and sat the tube on end for stand development. Problem that I had was the film moved to the top of the cap, out of the soup or partially out and end up with a nice bubble pattern where the film slipped out of the developer. This weekend I used 1000 ml, left the tube on it's side and used the notched pattern on the side of the tube to keep up with where the film should be. Rolled it in a tray of water and left it on it's side. Worked great...though that is a lot of developer for one little 5x7 neg.

Please post your results, interested in hearing how it worked out for you.

 

How did you find the density of your negs Mike? and do you think there will be proper contrast control through developing?

I'm wondering if the necessity for constant aggitation prevents the necessary 'still' periods for N++ control.

 

man, I thought only guys named Mike were posting to this one....Thanks John...

 

Couple of suggestions. You can roll 4 tubes at the same time if you alternate the cap end and roll two with each hand.
Also you know how they have a small hanging loop at the top of the cap? well I drilled holes 5 in apart on a piece of wood that I put in the sink. This way I can stand all the caps next to each other and load the tubes in the dark and screw them to the cap without fumbling. It is sort of a poor man's BTZS tray..

 

Jorge,
I have since used either a hot knife or power rotary sander to remove those things so they'll sit flat on a solid surface.

 

You dont want me near any tools that can cause bodily harm...I can see me making a hole the size of a quater trying to sand off those things....

 

Are these tubes 'one size fits all'? I use 4x5 and develop in a tray with the lights off. It works out pretty well but I spend so much time in the dark, I'm starting to feel like a bat. These tubes can be used with the light on? Well, after chemicals are loaded and caps screwed on right? How many sheets do you load per tube? Are the instructions that come with the tubes fairly clear?

 

Jorge - do you do much contrast control with tube development? I've been finding the tube development a bit too active so far.

Sure can!
I've tried 4 in one tube but found that even with careful turning I had one overlap another during developing. I didn't want to try it again.
Generally 2 off 4x5 sheets / tube works very well.

 

Sure have John, the trick is not to spin the tube too fast. I had the same problem when I was doing my tests. I first did a calibration test with tmy and HC110 and found that while the speed was falling where it should have, the expansion was too high, so I started spining the tubes slower and it worked.

Think about the Jobo drums, I think the recommended rotation is 42 rpm, but they are thick drums, so going slow with ours should not be a problem.

 

Yes I found 20% reduction in 'box times' seemed to give a good neg density.

That's interesting Jorge. I've just started spinning the tubes slower, and that does seem to work. I give them a good random slow spin/slosh for the first 2 minutes or so to develop the shadows and kick off an even development, then real slow (just enough to keep the negs wet constantly) for the remaining time, reducing time by 15-20%.
Problem is, there is still effectively constant aggitation, which I can't see would actually allow for contraction. There's no quantified info (that I've seen) for N+ or N- development in tubes. I haven't measured neg densities thoough like you.

I just hate fumbling around in the dark .

btw I found using only 1/2 - 1" of water in the tray allows the tubes to sit on the bottom and gives greater control turning the tubes.

 

Well, there is abig difference here. I do negatives for pt/pd, so my times and contraction still yield negatives that have higher densities than those for silver. There are couple of tricks you can use, a higher dilution, and/or a lower temperature should give you greater contraction. Be careful if you change the dilution that you dont exhaust the developer too soon.

 

Anything like this available in UK does anyone know ?

 

Hi Mike, the film did appear to move or float. That said, I also agitated by moving the tube left to right and down, in other words, like you might agitate a large film tank...that is where the problem came from, but I can not prove it. I put a sheet of film in the tank and let it sit for an hour filled with water to see if it would move, and it did not. Some people have good luck the first time, but somebody has to be that smaller percentage that has a problem.

 

Try putting the tube in a tray of water and GENTLY spinning it for your agitation then stand it up on end(the way it was prior to agitation.

As far as being afraid of the film being too far down....no problem at all. I shove mine way down there and when I need to retrieve at the end of processing I empty all chemistry and then hold the tube in my right hand with the open end toward my left hand and then give the tube a couple of sharp raps onto the open palm of the left hand. Kinda like clapping your hands but a tube is in one(right hand). This abrupt stopping brings the film up close to the open end for easy removal.

Does this make sense? It's pretty easy it's just hard to explain.

Hope that helps!

Mike

 

The fiberglass screen trick is still the easiest for film removal. Cut a piece of screen to film size, but leave an edge about an inch longer than the film. Trim all of the excess off until there is a tab left in the center (1" or 25mm, whichever comes first). Once film is loaded, just pull the tab to remove film. Quick and easy. Also allows fluid to circulate onto the back side of the film to remove anti-halation coating and make things work well. Make sure to cut to size so the screen isn't too big. The cut ends can scratch the film. tim