KenS
Member
I've used BTZS tubes for both 4x5 and 8x10 for years. Excellent system. I have a 25 watt light on when they go in the stop and fix. Never had an issue with fogging.
I'm going to 'double-up' on Andrews suggestion/recommendation for BTZS tubes. I use them for both 4x5 and my 8x10 films for years... I only wish they had been available a lot earlier in my life.
Might I also suggest... no, dammit.... recommend that you get extra 'caps'. I process mine in a "Tup**r-ware "tub" filled about half way with water (at temperature). Before starting loading the films for development, the 'extra' caps filled containing fixer are placed (in a row) at the rear of 'water-bath. Usually, my hands know exactly where they are in the dark .. as ready-to-use' fixer containers. The water-bath is used as a 'stop bath' after the used developer is poured out into a beaker to the right-hand side of the water-bath... and the tubes turned up-side down and quickly screwed into the 'standing-by' caps (with fixer)... and are given an 'agitation-type shake' for about 30 seconds and then put into the water-bath and again rotated (in both directions) for the required fixing time.
In the years since investing... and in using my BTZS tubes, I would be more than 'hard-pushed' to go back to either hanger-in-tank OR tray processing of sheet film.
Ken