The anti-tarnish on copper foil can be anything, an inorganic chromate conversion coating...at one time, they all were of this type... or organic, triazoles, or imidazoles, etc.

No spec...thickness is immeasurably small...in some cases approaches a monomolecular layer...

Are you looking for a test for presence of one?

Rudy Sedlak
RD Chemical Company ---------------------------------------------------
Technet Mail List provided as a free 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 847-509-9700 ext.5315
-----------------------------------------------------