You can dunk it in sulfuric acid and touch the chrome with a bar of zinc metal or add thiourea to etch the chrome. Aric Parr United Technologies Electronic Controls ______________________________ Reply Separator _________________________________ Subject: Re: FAB: to etch chrome but not copper Author: [log in to unmask] at internet Date: 8/1/96 7:59 PM RE: Etching chrome. As an unspecific recollection, I believe that a KOH + Potassium Permanganate solution will strip Chrome from Copper. I am not certain of concentrations and temperatures. Note that this will create environmental concerns on the spent etch solution and rinses. Marshall Gurian Coates ASI ______________________________ Reply Separator _________________________________ Subject: FAB: to etch chrome but not copper Author: [log in to unmask] at internet Date: 8/1/96 11:52 AM Can anyone tell me what etchant will dissolve chrome but not copper? I'm thinking about using cold dilute sulfuric acid but I'm not sure what is used commercially anymore. Thanks! *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * *************************************************************************** *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************