I forgot to add that i use a resin brush to apply the acid, brushing it on one side and then turning the blade and brushing it on the other side. Keep turning and brushing and observing the blade until you get the desired amount of color change. Iv,e also found that when you start to apply the acid that you get both sides wet quickly and keep them wet until you rinse the blade. Another way you can get a little more contrast especially on layered steel is to very carefully heat the blade evenly with a propane torch. It just needs to be heated just enough to open the pores in the steel. Done correctly, you will have a beautiful contrast between the high and low carbon areas. The acid will sometimes smoke a little bit but this does not effect the quality of the etch..............Dave
|