Davis reagent
Variant etchant for steel using cupric ammonium chloride (Cu(NH4)Cl4) in dilute HCl. Slower acting than Fry's, sometimes preferred when contrast on Fry's is too aggressive.
Variant etchant for steel using cupric ammonium chloride (Cu(NH4)Cl4) in dilute HCl. Slower acting than Fry's, sometimes preferred when contrast on Fry's is too aggressive.
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