Rudy, You mention that Immersion tin works best when used often, are you referring to working the bath or simply circulation/filtration of the chemistry. Additionally, have you had any experience with impacting the "life span" of the immersion tin chemistry if it is kept at operating temperatures for extended periods of time? Operating temperatures being approximately 120F to 160F? Lisa Angle Alternative Surface Finish Process Engineer "<Rudy Sedlak>" <[log in to unmask]>@IPC.ORG> on 11/07/2000 08:48:47 AM Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to [log in to unmask] Sent by: TechNet <[log in to unmask]> To: [log in to unmask] cc: Subject: Re: [TN] Board Whit Tin finish Another factor that may be obvious, (to the fabricators) but deserves comment. Immersion Tin is a bath that works best if used often, and is not allowed to sit idle for long periods....whereas OSP can tolerate long periods of non-use more easily. Rudy Sedlak RD Chemical Company --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or 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 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------