It is highly likely that green solder mask contains  pigment with halogens.
One of the very stable green pigments is made  by chlorinating the blue copper
phthalocyanine pigment - changing it to  green.  Here is from Wikepedia -
"The phthalo green molecules are  highly stable. They are resistant to alkali,
acids, _solvents_ (http://en.wikipedia.org/wiki/Solvent) , heat, and
_ultraviolet  radiation_ (http://en.wikipedia.org/wiki/Ultraviolet_radiation) . Due to
its stability, phthalo green is used in _inks_
(http://en.wikipedia.org/wiki/Ink) , coatings, and many _plastics_ (http://en.wikipedia.org/wiki/Plastic) . In
application it is transparent. The pigment is insoluble and has no tendency
to  migrate in the material. It is a standard pigment used in printing ink and
packaging industry."

Reportedly, the "green" (in Dewey's oxymoron sense) label for
environmentally compliant electronics is printed in blue, because printing in in  green
(color) would take the ink above the 1000 ppm limit.  35 years ago, I  worked in
the duPont green pigments plant, and that is how we made it.

Again, check with your supplier to make sure of the pigment  loading, and
whether he is using pure green, or some combination of blue and  yellow that
appears green.

Denny Fritz
MacDermid


In a message dated 2/20/2006 11:55:00 AM Eastern Standard Time,
[log in to unmask] writes:

Is  anyone on the forum aware if the green soldermask on boards  contains
halogens?





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