Your right on the money , I wonder why everyone considers something Halogen free , when It can have 900ppm of Cl and Br. to the best of my knowledge, they don't even look for F, or I . We have had a halogen free green for a couple of years now, but no major need in the States. Real big in Japan though. Another big monkey wrench in the mess of halogen is how to test it , and do you count free, bonded , or total in the material? I have seen some literature that some folks actually only count free halides. Any way What in this industry is changed without a major discussion.
On the other hand yes they did pack me up and ship me to Ca. I still have to work for a living, haven't hit the lotto yet. I guess Ill go by a ticket this week!
Nice hearing from you again
Russ
-----Original Message-----
From: Dennis Fritz [mailto:[log in to unmask]]
Sent: Tuesday, April 08, 2003 7:58 AM
To: [log in to unmask]
Subject: Re: [TN] New Topic: Why are most solder mask requirements,for
GREENm...
In a message dated 4/7/03 4:56:26 PM Central Daylight Time,
[log in to unmask] writes:
<< So My point was it's not rocket science to get most of the halogen out
when you make the mask blue. do you agree? >>
Yes, should be halogen minimized, of course with purified epoxy and no
brominated bisphenol A. Not much halogen in fumed silica filler, and
catalysts for polymerization are not halogen containing.
Did you move to California for Vantico, or are you still in Atlanta?
Denny Fritz
MacDermid.
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