Hi I am looking for pre clean information on drum side treated foil. It has been recommended to preclean prior to resist lamination, with a 16 to 20% sulfuric acid followed by nothing but water rinsing. Is this acceptable to remove the cromate coating and will it etch acceptable through alkaline etch? Does anyone recommend a better one step preclean for this materail? *************************************************************************** * 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. * ***************************************************************************