hi, just a word of caution about grit blasting the pwb with alumina. if there is any tin-lead plating (or equivalent) present, there is a strong chance that the grit will become embedded in it. it has been my experience that the grit will be very, very difficult to remove. phil -----Original Message----- From: Mark Mazzoli [mailto:[log in to unmask]] Sent: Friday, April 14, 2000 3:36 PM To: [log in to unmask] Subject: Re: [TN] Roughing up a board Hi Jason, You might try having them processed through an aluminum oxide blaster. I don't know about the documentation part of your question but I think you'll find that a high-pressure media sprayer, like aluminum oxide or whatever, will "matte" the surface without removing copper or damaging any feature. Mark Mazzoli ############################################################## 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. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ############################################################## ############################################################## 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. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################