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February 2014

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Subject:
From:
Mike Fenner <[log in to unmask]>
Reply To:
Date:
Tue, 25 Feb 2014 16:34:09 +0000
Content-Type:
text/plain
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Ho jogged an ancient memory...
Long, long ago when I was a young trainee at BBC, I was on the original Dr
Who programme. I was intrigued to see a model of a building made out of
Styrofoam in a corner of the studio. 
When the time came for the building to be destroyed by the alien's heat ray
the special effect guys pumped solvent over it from hand pump sprayers (of
the type used for spraying insecticides). It was really convincing - in
black and white of course, and obviously before health and safety was
invented.

Regards 
 
Mike 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Thursday, February 20, 2014 11:33 PM
To: [log in to unmask]
Subject: Re: [TN] Acetone as a cleaning agent for PCBA's...cool thing you
can do with acetone

Now here's something cool to do with acetone:

http://www.youtube.com/watch?v=h9Jx8NRkWTo

Naw, it won't hurt your boards...    :o)

Steve 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Karen Tellefsen
Sent: Thursday, February 20, 2014 4:18 PM
To: [log in to unmask]
Subject: Re: [TN] Acetone as a cleaning agent for PCBA's

I don't think acetone has white residues, but maybe it attacks the
solder mask giving the appearance of white residue.

I would run a compatibility evaluation of acetone on the PCBA,
particularly the solder mask, before using it as a cleaner.

Karen Tellefsen - Electrical Testing
Alpha / 109 Corporate Blvd./ S. Plainfield, NJ 07080
[log in to unmask]
908-791-3069




From:   Robert Kondner <[log in to unmask]>
To:     <[log in to unmask]>, 
Date:   02/20/2014 01:21 PM
Subject:        Re: [TN] Acetone as a cleaning agent for PCBA's
Sent by:        TechNet <[log in to unmask]>



  Toxic - Yes
  Flammable - Yes, May I add explosive vapors too!

 But White Residue -  No, I think that is wrong. Why do you suggest
this?

 Any comments on White Residue ?  (I almost don't ask this as White
Residues can be a horror story of a question. The Brian Ellis book
covers this
well.)

Bob K.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Reuven Rokah
Sent: Thursday, February 20, 2014 1:08 PM
To: [log in to unmask]
Subject: Re: [TN] Acetone as a cleaning agent for PCBA's

Hi Bob,
Acetone is toxic, flammable and have white residues.


On Thu, Feb 20, 2014 at 6:59 PM, Robert DeQuattro <
[log in to unmask]> wrote:

> I have a customer that uses acetone to wipe down their PCBA's upon
receipt.
> The assemblies we make for them are cleaned using a closed loop 
> aqueous board washer then sampled for cleanliness with our zero-ion 
> tester per J-std-001E guidelines.
> Recently this customer commented that boards appeared dirty upon 
> cleaning with the acetone.  Does anyone have any thoughts on this 
> acetone cleaning process.
> Thanks,
>
> Bob
>
> ______________________________________________________________________
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-- 

Best Regards,

*Reuven Rokah*

Mobile: 972-52-6012018
Tel:        972-3-9360688
Fax:          076-5100674
 <http://www.rokah-technologies.com/>[log in to unmask]
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www.rokah-technologies.com


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