I have your book. Great stuff. I like the odd language with very personal
expressions and humoristic formulations. Indeed a personal work, good
entertainment besides the massive content of facts. I recommend the book.
Every process engineer ought to have it on the desk. If you can get it.....
Inge
----- Original Message -----
From: "Brian Ellis" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 21, 2009 8:17 AM
Subject: Re: [TN] Contamination by Hand Sanitizers & Lotions
> Apart from the thread on this subject here a month or two back, the only
> mention in literature that I know of is in my book, which discusses in a
> diagrammatic form not only the effect of lotions before and after
> soldering. Sanitisers didn't exist in those days, but their effect is
> similar to lotions, although their oily components are lower.
>
> As an addendum to my post in the earlier thread, I was back in hospital
> for another operation last week and found that they had placed
> squirt-bottles of sanitisers every 5 m along all the corridors, presumably
> as an anti-H1N1 measure. This allowed me to have better access to the
> stuff and I found that the hand was persistently contaminated. I was able
> to repeat my mirror test 2 or 3 hours after deliberately using the
> sanitiser correctly, being careful not to handle anything in the
> meanwhile. As one of the components is a high molecular weight polymerised
> glycol, it is a reasonable assumption that this is the persistent
> substance. As it is hygroscopic, it is also a reasonable assumption that
> it's not going to improve sensitive electronics if transferred from the
> hand to an assembly. If such transfer occurs before soldering, then the
> heat may cause further polymerisation, rendering the hygroscopic residues
> more difficult, maybe impossible, to remove.
>
> Brian
>
> Diljit Matharu wrote:
>> Can someone direct me to resources which talk about PCBAs contamination
>> by the use of hand sanitizers & lotions.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Diljit S. Matharu
>> Quality Leader - B C
>> Creation Technologies
>>
>> Office: 604.430.4336 x 3395 | Mobile: 778.240.8144
>> 8977 Fraserton Court | Burnaby, BC, Canada | V5J 5G1
>> [log in to unmask]<mailto:[log in to unmask]> |
>> www.creationtech.com<http://www.creationtech.com/>
>>
>> [cid:[log in to unmask]]Working together to build the future
>>
>>
>>
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