Home Made proc. tubes

[joeyrsmith]

Quick question for all plz.
Has anyone used white abs pipe for BTZS type tubes for 4x5 sheet film?
I can not find black abs for the life of me in my region.
I am thinking it should be ok, once closed it has to be black inside.
Thx
Joey -- new to 4x5

[Drew Wiley]

White drainage pipe is typically vinyl and NOT fully opaque. ABS has a more complex core and is quite opaque, but you need to scrub and rinse it well to get rid
of the sulfur impurities generally present on new pipe. But I can't imagine where
you'd live and not be able to find ABS. It's a standard plumbing commodity. Heavier
guages of large diameter PVC pipe do exist, but they're a lot more expensive than draingage pirpe, and far less common than ABS.

[Nathan Potter]

Be careful. It is really translucent so some light will pass through but I can't tell you exactly how much. It will depend on the tube thickness and the intensity of outside light. You will find some suppliers of black PVC tubing by going on line - use Google.
BTW PVC will be attacked slowly by acetic acid but many people ignore the slow surface discoloration and I suspect it is OK with normal stop bath.

Nate Potter, Boston MA.

[joeyrsmith]

I stand corrected.
The test pipe I bought is PVC Type-1. 2in diameter.
I live in Key West, FL I have only 2 home depot in the Keys.
No Black pipe anywhere.
thx
joey

[Gem Singer]

Try a dealership that sells and services recreational vehicles.

RV's use ABS piping for their water supply and drainage systems.

That's where I managed to find a few short lengths of ABS piping in the past.

[AJ Edmondson]

I have made them from PVC, spray-painted the outside with black epoxy and used a table saw to cut a groove on the tube (for an o-ring) so that the cap seals. My home-made tubes actually seal better than my BTZS for some reason.

[joeyrsmith]

Joel, so the black epoxy was not a problem in the stop bat, etc?
Thx for the replies.
Joey

[sepiareverb]

A plumbing supply house will get you some- or call a plumber?

[AJ Edmondson]

The black epoxy paint was used only on the outside and hasn't been a problem in the six years I have been using them. I would have preferred ABS but couldn't get the end caps in the small town where I lived at that time. Actually, in the subdued light of the darkroom - even with PVC - the only problem area was the end-caps which were thinner and did transmit enough light to cause problems!

[David Beal]

Ask a friend or relative to go to the nearest Loew's. They have all the black ABS you'll need, with a large assortment of fittings.

Good processing.

/s/ David