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LegacyPro EcoPro BW Clear Stop Bath

Posted: Sat Aug 12, 2017 4:08 pm
by darkroomfan3

I am wondering how to tell if my stop bath is exhausted.

Thank you for your help! :)

Re: LegacyPro EcoPro BW Clear Stop Bath

Posted: Sun Aug 13, 2017 5:10 am
by Digitaltruth
The easiest way is to use pH indicator test strips or a test meter. Full information (including links to purchase third-party testing kits) can be found here:

Alternatively, you can simply change it at the same time as the fixer, or at the end of each session. The exact throughput is hard to measure as developer carry-over and local variables will have differing effects on the lifespan, but if you use pH strips for a while you will be able to work out your typical throughput.

Please bear in mind that we recommend using a water bath in place of a stop bath for the best archival speed and economy. The stop bath product is provided primarily for multi-user darkrooms where it can be useful to prolong the life of the fixer and maintain reliability.

For full details on archival processing please see: ... ndwash.php

Re: LegacyPro EcoPro BW Clear Stop Bath

Posted: Tue Aug 15, 2017 6:17 pm
by darkroomfan3
Thank you for your speedy reply! That is exactly the information that I needed! I am so glad this forum exists!