Dear Technetter To gain best bonding of dry film to the base material some of the parameters must be controlled strictly such as temperature of rollers of laminator or sodium carbonate and may be the most critical parameter is surface roughness. Our dry film supplier suggest roughness value for Rz 1,5 - 3 microns for Ra 0,15 -0 ,3 microns. I want to have your comments if Rz is normal I mean between 1,5 and 3 microns let us say Rz is 2.10 and Ra is 0.41 microns, how can we interprete or comment on these value; does it bring good bonding with it or it is an obstacke for dry film to bond to surface Thanks in advance for your interpretations and knowledge share Best Regards -- Yusuf GÖMEÇ Product Quality Engineer BASKI DEVRE SAN ve TIC LTD STI Ceyhan Sk. No:10 34896 Pendik-Istanbul-Turkey Tel: 00 90 216 3901036 (4 Hat/Line)-173(Extention) 00 90 216 4836560 (4 Hat/Line)-173(Extention) Fax: 00 90 216 3544941 00 90 216 4913269 Gsm: 00 90 533 6579897 00 90 533 7480014 msn: [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------