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Bob,
Try a "Water Pick" from a drug store, I got one at Walmart. I use it after
rework of a small part, it really blasts water under parts. I fill the
container with hot water and blast under small SMT parts. For complete board
wash I use a spray assembly like found on a kitchen sink.
This is ok for protos but a real washing system would be suggested for
production. It takes a long, good, hot spray to get under BGAs. For QFNs
forget it, you can not clean under those parts. Cleaning solutions are a big
help.
Also:
I did not see any comments on my analyses of using tap water. Even with
500mg / L dissolved solids tap water it takes a good number of small drops
to push towards the 10ug/insq limit. A 1mm drop (1/2 sphere) per 1 inch sq
is only .25 ug/insq. It would take 40 drops per inch square and THAT is a
lot of tap water. A quick blow off with an air gun leaves much less.
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Landman
Sent: Wednesday, September 08, 2010 5:18 PM
To: [log in to unmask]
Subject: Re: [TN] Hand Soldering
We switched to water-soluble Kester brand and are very satisfied with it.
Hot water and a good brush (we use a dish washing brush).
Bob Landman
H&L Instruments. LLC
On Sep 6, 2010, at 6:30 AM, Kenneth Wood wrote:
> Hi all.
> What is the best setup for hand soldering as far as solder / cleaner?
> Rosin core? Water soluble? No-Clean?
> What cleaner too?
>
> I've been using rosin core with various cleaners but I have a hard time
with
> the white residue the cleaners leave.
>
> Thanks
> Ken
>
>
>
>
>
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