In message <[log in to unmask]> Karen Tellefsen writes:
> Alpha sells Solder Stop 110.  Do not use pealable masks 
> with no-clean assembly.  Both Solder Stop 110 and Wondermask
> are highly ionic and real bad SIR killers.

Could you please give an explanation or data to back up your advice to not use 
peelable masks with a no-clean process? We have been supplying latex-based 
temporary solder masks for many years to companies who do not clean after 
soldering, with no complaints. I agree that these types of materials do contain 
low levels of halides. However, I have no evidence that a properly cured 
material (which will be removed leaving no (visible) residue) has caused any 
problem. I believe your advice to be at odds with actual practice at many 
thousands of companies.

Peter
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Peter Swanson                                              Oxfordshire, England
INTERTRONICS
[log in to unmask]                              Compuserve: 100120,3641
           http://ourworld.compuserve.com/homepages/Peter_Swanson
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