[log in to unmask] Wrote:
| 
| There are two primary equations that I know of.  The first is 
| more of a rule
| of thumb and is based on an Arrhenius rate of reaction.  The 
| second, which is
| recommended, is the Eyring Model.  The IPC SIR Handbook 
| (IPC-9201), which is
| nearing publication, has a section detailing this equation.  
| It can also be
| found in the original report of the Low Residue Soldering 
| Task Force.  I
| don't think it will come across well as an ASCII text 
| message.  If  you will
| give me a fax number or mailing address, I can send you the 
| necessary
| references.

Doug, 

Thank you very much.  I would like to study the two primary equations that 
you have cited.  Could you send me these two primary equations and the 
section in IPC-9201 which describe the Eyring model (only if there are not 
many pages). My fax number is (503)627-5062.  Thanks again for your 
guidance.


Nora 
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