pete at dunnington.plus.com
Thu Oct 25 12:16:52 CDT 2007
On 25/10/2007 17:03, William Donzelli wrote:
> It seems, from a past thread, that leaded solder is starting to become
> a concern around here.
I don't understand why that should be. I think that's a misperception.
It's not banned, just not permitted under RoHS for new
electrical/electronic equipment for sale. It's still allowed for
repairs upgrades or expansions to pre-July 2006 things that already
contain leaded solder. It's still being made by most companies because
some things are exempt from the RoHS directives, such as leaded solder
for servers, storage and storage array systems, network infrastructure
equipment, and other applications including the coatings on some pin
connector systems, solder for some microprocessor BGA packages, solder
for high power loudspeakers and acoustic transducers, etc. There are
many more exemptions for lead, lead alloys, and lead compounds in
High-temperature solders containing over 85% lead are completely exempt.
Another example: it's banned in Europe for plumbing involving drinking
water or food preparation, but not for other water uses. Even Farnell
-- who are currently "dumping" non-RoHS-compliant stock of many lines at
up to 90% discount and labelling most non-RoHS stock as no longer
available after stock is exhausted -- are still selling tin/lead solder.
Oh, and military uses are exempt (what a surprise) along with the
aerospace, space, and defence industries.
Pete Peter Turnbull
University of York
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