Quote Originally Posted by aldevo View Post
But, as has been the case wiith a lot of Crawley's formulations, shelf-life was a problem. FX-50 has been, AFAIK, discontinued.
I tried FX-50 when it was available from Paterson about five years ago and, once the bottles had been opened, it went off in about a week (yes, you read that right!). In my view it was a bit mad to make a commercial product that was so unreliable.

I like the other Paterson (Crawley-forumulated) Aculux and FX-39 developers, however, which you can order directly from their web site: