[sdiy] somewhat OT: trying to identify perf board chemical

[cheater cheater]

Or you can leave it, and just use rosin core :^) A lot of it and a lot
of flux :^)
Especially leave it if this thing is going inside a tank. Grease 'em up!

On Wed, Sep 2, 2009 at 9:58 PM, David G. Dixon<dixon at interchange.ubc.ca> wrote:
> Yeah.  Acetone and a rag or cotton balls oughta do it.
>
> David G. Dixon
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>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl [mailto:synth-diy-
>> bounces at dropmix.xs4all.nl] On Behalf Of cheater cheater
>> Sent: Wednesday, September 02, 2009 1:54 PM
>> To: synth-diy
>> Subject: Re: [sdiy] somewhat OT: trying to identify perf board chemical
>>
>> That's what I thought. WD-40 put on the board so that it doesn't
>> oxidize or even rust up.
>>
>> D.
>>
>> On Wed, Sep 2, 2009 at 9:20 PM, David G. Dixon<dixon at interchange.ubc.ca>
>> wrote:
>> >> Sounds like a job for David Dixon! :)
>> >
>> > Well, Aaron, my specialty is more inorganic than organic.  However, if
>> it
>> > were me (which it wouldn't be, because I don't use perfboard anymore), I
>> > would probably try rubbing the boards with acetone or gasoline to see if
>> the
>> > sticky stuff comes off.  Of course, I would also use rubber gloves and
>> > goggles, and perhaps even a mask, and work in a well-ventilated area,
>> > preferably outside.  Then I would dispose of the spent solvent in an
>> > environmentally acceptable manner in accordance with local regulations.
>> >
>> > I think that once the slick stuff is removed, the boards underneath are
>> > probably fine.  It is probably a lubricant used during the drilling
>> process
>> > to prevent the drill from overheating, which is left on because either
>> the
>> > company is too cheap to remove it, and/or because it helps prevent
>> oxidation
>> > during handling and shipping.  As such, it is probably something akin to
>> > machine oil, which often has a sickly sweet smell to it.  I'm pretty
>> sure it
>> > isn't OSP (organic solderability preservative), because that stuff is
>> > typically only a few atoms thick, and would simply look like clean
>> copper.
>> > Also, I doubt that they would waste that stuff on perfboard.
>> >
>> > That's my best punditry on the topic.
>> >
>> >
>> >>
>> >> - Aaron
>> >>
>> >> On Sep 2, 2009, at 3:45 PM, John Richetta wrote:
>> >>
>> >> > So, case in point: I bought one of his bigger lots of perf board.
>> >> > This stuff seems great: you can hardly find it any more, and never
>> >> > at a good price.  Well, the down side to the lot I bought is that
>> >> > the entire stack of it appears to be coated in some sort of slick,
>> >> > clear, slightly slippery chemical, that has a strong, plasticky,
>> >> > somewhat sweet smell to it.  Not sure how else to characterize it
>> >> > except perhaps as "artificial" and "volatile" smelling.
>> >> >
>> >> > (There is a remote chance that the chemical isn't really the source
>> >> > of the smell, or all of it, and that the perf board material itself,
>> >> > which appears to be mostly plastic, is what smells most.  I don't
>> >> > think this likely, though, given the dissimilarity of the smell to
>> >> > anything I've experienced with perf board, previously.)
>> >> >
>> >> > My question is: has anyone acquired such material before, and have
>> >> > any good guess as to what this chemical is?  I'd like to know how
>> >> > hazardous it might be.  The Chinese, no disrespect intended, do not
>> >> > have a great track record WRT electronics and toxic materials
>> >> > (arguably largely due to circumstances we help create), so I fear I
>> >> > could well be handling either toxic materials once produced here and
>> >> > shipped there, once it became illegal, or toxic material that
>> >> > originated elsewhere and should not ever be shipped into the country
>> >> > but was anyway, thanks to the wonder that is eBay.  Maybe it was a
>> >> > solvent used by his crew to clean up some boards in bad shape
>> >> > (doesn't look like they are anything other than brand spanking new),
>> >> > or perhaps it's a "preservative" chemical, in some way.
>> >> >
>> >> > I know, this isn't a lot to go on WRT the all-important point of
>> >> > "what exactly does it smell like," but I'm just hoping someone here
>> >> > might happen to have experience with this supplier, or (more
>> >> > remotely) some chemicals that might possibly be commonly used in
>> >> > this context.
>> >>
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