The etchant I located is fMG Chemicals Ferric Chloride Liquid, item number 415. The concentration of the solution is:
Percent (wt/wt) of Ferric Chloride (FeCl3) ≥38.4% Percent (wt/wt) of Ferrous Chloride (FeCl2) <1.5% Percent (wt/wt) of Hydrochloric Acid (HCl) <0.8% Percent (wt/wt) of Insolubles <0.5%
I am NOT a chemist. Does the % or Ferric Chloride being a little less than 50% mean that if I made a 10% solution, it's actually less than half that strength?