I use a formula that I slightly modified out of Angier's and it has Nitric acid as well as Ferric Chloride for Browning. A deeper bite than I like when used straight but I have no issues with it all when reduced. I love the color it gives, a deep rich brown with slight reddish overtones. I tend to reduce the strength of the solution as I get closer to finishing up with damascus tubes. On steel tubes I use Pilkington's straight but short cycles and I am extra careful if the room temperature is over about 65 degrees, which is not too often in my bluing room, only in the summer really.
Last edited by SKB; 08/12/22 02:16 PM.
