[volt-nuts] Best cleaning procedure for precision cirquits

[J. Forster]

Alpha also sold a "saponifier" used with hot water, Alpha 2001, which
removed rosin very well.

I did not mention it because it's an industrial chemical and comes in 5
gallon pails.

-John

===========


> By far the most effective board cleaner I ever used was Alpha 564. I
> remember back in the eighties Alpha 564 was used by major PCB
> manufacturers as part of their solder bath assembly line processes - the
> boards were automatically skimmed across a Alpha 564 bath after they were
> skimmed across the solder bath. The Alpha 564 bath removed all resin,
> leaving the boards looking factory perfect and new. However I was always
> aware that Alpha 564 is a hazardous chemical. (So you must be careful not
> to get it on your hands, nor breath the fumes, nor dispose of it
> improperly in the environment.)
>
> I did find that the Solder Connection, in the UK, still sells Alpha 564:
> http://www.solderconnection.com/prod_detail.php?product_id=39&PHPSESSID=a8b961ca4cab940fd51e1a1875fe2ce0
>
> Although Alpha 564 does a great job of cleaning boards, the more I read
> about its composition, for safety and health reasons I unfortunately
> cannot recommend it to most of us in this group. ...just too hazardous to
> use...
>
> See:
> Tetrachloroethylene Hazardous Substance Fact Sheet (New Jersey Dept. of
> Health & Senior Services)
> http://www.newjersey.gov/health/eoh/rtkweb/documents/fs/1810.pdf
>
> Alpha 564 datasheet and Safety are at:
> http://www.solderconnection.com/specsheets/21427.pdf
>
>
> Current Alpha Board Cleaners are listed at:
> http://alpha.cooksonelectronics.com/products/cleaners/alpha-cleaners.asp
> Maybe some of them are highly effective? Anybody in this group familiar
> with any of them?
>
> Greg
>
>
>
> ----- Original Message -----
> From: "Andreas Jahn" <Andreas_-_Jahn at t-online.de>
> To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
> Sent: Saturday, September 25, 2010 4:03 PM
> Subject: [volt-nuts] Best cleaning procedure for precision cirquits
>
>
> Hello all,
>
> currently I am soldering my first LTZ1000A reference board.
>
> Up to now I am cleaning my precision boards after soldering with
> denatured alcohol in a pre-washing and a main washing procedure.
>
> After this the last washing stage is with clean water to get rid of the
> white haze from the denatured alcohol.
>
> What is the best cleaning procedure?
> Is there one in a repair manual of any precision instrument?
> Which of the near best procedure can be done at a home?
> What are You doing to clean the boards?
>
> best regards
>
> Andreas
>
>
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