Stop using Ferric Chloride etchant! (A better etching solution.)- ( I am just getting into etching metals but this sure seems a better alternative than some i have read. If anyone tries this let me know if it works as well as it seems to.
Ferric Nitrate is only available in crystals and requires dilution . Dilution for crystals is 1 part crystals to 3 parts distilled water for etching silver. One source of chemical is here at the Science Company.