Depend on the flux type.  Reworked no clean flux may leave white residues.


On Fri, Feb 21, 2014 at 1:17 AM, Karen Tellefsen <[log in to unmask]>wrote:

> 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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>
> --
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> Best Regards,
>
> *Reuven Rokah*
>
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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]
[log in to unmask]
www.rokah-technologies.com


This e-mail message is intended for the recipient only and contains
information which is CONFIDENTIAL and which may be proprietary of Rokah
Technologies. If you have received this transmission in error, please
inform me by e-mail, phone or fax, and then please delete all of the
original files and all other copies exist.


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