Hello to all technetters : Recently I have been trying to figure out the best pretreatment method for alloy42 materials for further plating processes .Could someone share some info on this , since alloy42 materials is very sensitive in nature . We have tried using 5% sulphuric acid and others proprietary chemicals also sulphuric acid based , the operating window is limited . Thanks . ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################