I'm not Sandy, but my tubes are made to be used vertically, with the tube full of developer and agitated by inversion (they have daylight fill tubes and liquid tight inversion caps). I've had good results with semi-stand and stand development in this kind of tube. Vertical tubes with open ends, for use in a deep tank, should work well, but ABS is the wrong stuff in this case; ABS pipe is "cellular core" which means it's foam with a solid surface inside and out; as such, it floats in liquid. If you use PVC instead, the plastic itself might float (especially in solute-rich developers like D-76 stock), but not to anything like the extent the cellular core ABS does.Originally Posted by Daniel Grenier
Of course, for 7x17 (inches, LF panoramic, right?) you'd need 17-18 inches of 3" diameter pipe (I haven't seen 2.5 inch, and two inch would be too small), which comes to a LOT of developer per sheet -- or 7-8 inches of 6" diameter, which I'm pretty sure is hard to come by (and would be prone to the film unseating from fluid motion due to agitation). A single 16x20 tray, with chemicals poured in and out as you go, would be much more practical in terms of chemical volume per square inch of film (except that pouring out of that size tray in the dark promises to be Too Much Fun). The down side, as always, with this kind of tube-in-tray process is that you're limited to constant agitation, and can't use reduced agitation to control contrast and compensation.