I think these things work in two ways: 1) A substance which relies on absorbed moisture to make the surface static dissipative. Performance will therefore rely on relative humidity. Most common types are like this. 2) A substance which has an inherently conductive ingredient, albeit a low conductivity (e.g. ITO?). These are not humidity dependent. I would not call the first type "permanent". The second type should work for long periods unless other factors kick in. For both types, permanency will also depend on adhesion to the substrate and resistance to any abrasion or other wear & tear. If your fixture is, say, made of ptfe and is subject to a lot of stuff rubbing against it, then I would guess "permanent" is also unlikely. Like all ESD measures, regular audits are best. Regards, Peter -------------------------------------------------------- Peter Swanson [log in to unmask] INTERTRONICS http://www.intertronics.co.uk Tel: +44 1865 842842 Oxfordshire, England INTERTRONICS is dedicated to providing quality material, consumable and equipment solutions to the high technology, high performance assembly industries, incorporating outstanding levels of technical support and customer service. Read our news! http://www.intertronics.co.uk/blog/blog.htm INTERTRONICS is the trading name of Cygnet Electronics Ltd, registered in England No 1835617. Registered office: 17 Station Field Industrial Estate, KIDLINGTON, Oxfordshire, OX5 1JD, ENGLAND. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee Whiteman Sent: 29 April 2009 18:08 To: [log in to unmask] Subject: [TN] STATIC DISSIPATIVE COATINGS Has anyone ever used static dissipative coatings? There is a coating manufacturer whose claims that their coating when applied will make a fixture permanently static dissipative. Any thoughts? Thanks... Lee Whiteman, PMP Senior Member Engineering Staff L-3 Communications East Telephone: (856) 338-3508 FAX: (856) 338-2906 E-Mail: [log in to unmask] --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 -----------------------------------------------------