Groups > sci.electronics.design > #461927

Re: Again with flux removal

From	rickman <gnuarm@gmail.com>
Newsgroups	sci.electronics.design
Subject	Re: Again with flux removal
Date	2017-05-26 20:46 -0400
Organization	A noiseless patient Spider
Message-ID	<ogai2p$prm$1@dont-email.me> (permalink)
References	<3875e5b6-3f13-4d8d-b65c-621376c04885@googlegroups.com> <no4ficl7jt3m3b081ljeu05gvvqsq7stcn@4ax.com> <og8bjn$na7$1@dont-email.me> <og9utv$rb9$1@dont-email.me>

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Sergey Kubushyn wrote on 5/26/2017 3:16 PM:
> rickman <gnuarm@gmail.com> wrote:
>> Spehro Pefhany wrote on 5/25/2017 10:43 PM:
>>> On Thu, 25 May 2017 11:32:14 -0700 (PDT), the renowned George Herold
>>> <gherold@teachspin.com> wrote:
>>>
>>>> Well this is a good thread
>>>> https://groups.google.com/forum/?fromgroups=&hl=en#!searchin/sci.electronics.design/rosin$20flux%7Csort:relevance/sci.electronics.design/iYOz2oYarTY/xFZwiD-1izYJ
>>>>
>>>> (Sorry I'm not sure how to rip out the search function.)
>>>>
>>>> Oh and an updated link to Jeff L's White residue pdf
>>>> http://www.kester.com/Portals/0/Documents/Knowledge%20Base/White_Residue.pdf
>>>>
>>>> Anyway I've got a few hand built pcb's Kester 44 solder/ rosin flux.
>>>> They are not high impedance and I just want them to look nice.
>>>>
>>>> I tried cleaning with IPA only... looked like crap.
>>>>
>>>> So I'm using IPA then detergent and hot water.
>>>> Well the detergent is this "awesome cleaner"
>>>> https://www.amazon.com/LAS-PURPOSE-CONCENTRATED-TOTALLY-AWESOME/dp/B0017KT3IM
>>>>
>>>> (as seen on TV :^)
>>>>
>>>> Any thoughts?
>>>> George H.
>>>
>>> For prototypes I use Recochem lacquer thinner from Crappy Tire and a
>>> toothbrush. The boards look great and are easy to inspect.
>>>
>>> Not all lacquer thinners are equal- this one is relatively low in
>>> acetone, about 10%.
>>>
>>> https://web.chempliance.com/MSDS/OpenDoc.ashx?DocID=24450
>>>
>>> It's mostly toluene + methanol + xylene. It can take markings off of
>>> some parts, but it is nowhere as bad as pure acetone.
>>
>> Seems like a bit of overkill.  Does ethyl alcohol not work for you?
>> Toluene and xylene have been found to increase the risk of some
>> leukemias.  I can't see a reason to use them at all if you can avoid it.
>
> Are you from Califonia? They must've been adding something to the water so
> their entire population is zombified...
>
> If you look at most any solvent sold in home improvement stores all over the
> country you would almost certainly find some note kinda "Not for sale in
> California"...
>
> It is definitely harmful if you have to breethe it 5 days a week for full 8
> hours but sniffing it occasionally from time to time is no more harmful than
> going outside and taking a breath of "fresh air" filled with all kinds of
> pollutants. Even pure hydrogen dioxide is lethal in proper doses...

Yes, that is the typical ignorant response to health effects of 
substances.  You are free to breath what you wish.  As I mentioned, the 
impact of individual substances are often not so great so as to warrant 
banning outright.  There is a thing called augmentation.  Two substances 
cause infrequent cancers with separate exposure.  Combine them and the 
rate of cancers becomes much higher.  They can't possibly test against 
all possible combinations of the tens of thousands of chemicals we 
potentially can be exposed to.  So a little caution can go a long way.

Cancer rates continue to climb.  It's not like you don't have any 
control over what you are exposed to.

-- 

Rick C

Thread

Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-25 11:32 -0700
  Re: Again with flux removal John S <Sophi.2@invalid.org> - 2017-05-25 14:37 -0500
  Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-25 15:54 -0400
    Re: Again with flux removal Jon Elson <jmelson@wustl.edu> - 2017-05-25 16:22 -0500
  Re: Again with flux removal Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-05-25 16:20 -0400
    Re: Again with flux removal Sergey Kubushyn <ksi@koi8.net> - 2017-05-25 21:25 +0000
      Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-25 18:31 -0400
        Re: Again with flux removal Sergey Kubushyn <ksi@koi8.net> - 2017-05-26 15:05 +0000
          Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 12:06 -0400
        Re: Again with flux removal DemonicTubes <tlackie@gmail.com> - 2017-05-26 10:27 -0700
      Re: Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-26 08:48 -0700
      Re: Again with flux removal Joseph Gwinn <gwinn@comcast.net> - 2017-05-26 18:06 -0400
        Re: Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-26 17:32 -0700
      Re: Again with flux removal Joseph Gwinn <gwinn@comcast.net> - 2017-05-26 18:13 -0400
      Re: Again with flux removal (Test - ignore duplicate) Joseph Gwinn <gwinn@comcast.net> - 2017-05-26 18:20 -0400
      Re: Again with flux removal (Test - ignore duplicate) Joseph Gwinn <gwinn@comcast.net> - 2017-05-26 18:35 -0400
  Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-25 17:15 -0700
    Re: Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-26 06:39 -0700
      Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 12:08 -0400
        Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-26 10:12 -0700
          Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 14:08 -0400
            Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-26 13:56 -0700
              Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 20:35 -0400
                Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-26 18:10 -0700
                Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 21:28 -0400
      Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-26 09:45 -0700
        Re: Again with flux removal Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-05-26 10:02 -0700
          Re: Again with flux removal Jeff Liebermann <jeffl@cruzio.com> - 2017-05-26 10:43 -0700
            Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 14:00 -0400
  Re: Again with flux removal Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-05-25 22:43 -0400
    Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 00:43 -0400
      Re: Again with flux removal Sergey Kubushyn <ksi@koi8.net> - 2017-05-26 19:16 +0000
        Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 20:46 -0400
          Re: Again with flux removal Sergey Kubushyn <ksi@koi8.net> - 2017-05-27 02:08 +0000
            Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-27 01:06 -0400
              Re: Again with flux removal Sergey Kubushyn <ksi@koi8.net> - 2017-05-27 05:38 +0000
              Re: Again with flux removal Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-27 08:17 +0000
                Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-27 04:37 -0400
                Re: Again with flux removal Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-27 10:33 +0000
                Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-27 11:51 -0400
                Re: Again with flux removal Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-27 15:59 +0000
                Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-27 12:13 -0400
                Re: Again with flux removal Jan Panteltje <pNa0nStpealmtje@yahoo.com> - 2017-05-27 16:27 +0000
    Re: Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-26 07:00 -0700
      Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 12:13 -0400
  Re: Again with flux removal whit3rd <whit3rd@gmail.com> - 2017-05-25 21:28 -0700
    Re: Again with flux removal George Herold <gherold@teachspin.com> - 2017-05-26 07:04 -0700
      Re: Again with flux removal rickman <gnuarm@gmail.com> - 2017-05-26 12:16 -0400
      Re: Again with flux removal whit3rd <whit3rd@gmail.com> - 2017-05-26 14:33 -0700

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