I think it important when considering the question, and answers, that we
differentiate between fumes associated with solder, or a solder containing
product (pastes), and fluxes. One of the key considerations is the vapor
pressure of the metal constituents, lead being the focus here. It is quite
low at the temperatures we are talking about, virtually undetectable. A
flux material, on the other hand, is much more inclined to undergo phase
change and become airborne.

It is imperative that proper venting and hygiene practices be in effect for
any industrial process, but it is critical to know what you are trying to
capture or treat in order to properly design and implement procedures and
processes.

I wish to clarify that the effects mentioned, while accurate in
description, should be associated with the volatile components, not the
metals.

Joseph Webb
TET/Halco

################################################################
TechNet E-Mail Forum 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's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################