Posted by David Williamson on December 4, 2014, 5:57 am, in reply to "ferric chloride"
Al, it has been so long that I have mixed it, but I believe it was 80% distilled water and 20% etchant (RS). I keep it in a 4" pvc container with a screw top. I made it about 5 years ago and it still seems to be working the last time I did a set of barrels.