11 Feb
2003
11 Feb
'03
12:56 p.m.
Can anyone suggest a safe way to remove grime that is so old and so thick
that the only way to remove it is to rub it off with your bare fingers?
I slathered this board in contact cleaner and it didn't do anything. The
grime just remained. If I rub it with my bare fingers then it will
eventually start to rub off and leave little remainders like pencil eraser
droppings.
Any ideas?
--
Sellam Ismail Vintage Computer Festival
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International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
11 Feb
11 Feb
1:14 p.m.
Quothe Vintage Computer Festival, from writings of Tue, Feb 11, 2003
at 06:49:29PM -0800:
Can anyone suggest a safe way to remove grime that is
so old and so thick
that the only way to remove it is to rub it off with your bare fingers?
Not sure if it's safe on circuit boards, but I've used Simple Green
to wash the cases of computers with... worked great, no damage.
I slathered this board in contact cleaner and it
didn't do anything. The
Wasn't there a thread a while back in which someone mentioned washing
circuit boards in a dishwasher?
grime just remained. If I rub it with my bare fingers
then it will
eventually start to rub off and leave little remainders like pencil eraser
droppings.
Several years ago, I used some sort of circuit board cleaner to clean
up some very dirty circuit boards; not sure if I have any cans of this
left, but I'll check to see if I can find out what this was.
--
Copyright (C) 2002 R. D. Davis The difference between humans & other animals:
All Rights Reserved an unnatural belief that we're above Nature &
rdd(a)rddavis.org 410-744-4900 her other creatures, using dogma to justify such
http://www.rddavis.org beliefs and to justify much human cruelty.
5:49 p.m.
R. D. Davis wrote:
I know Lee Davison's done it. Only catch is,
you may have to replace a few
components after cleaning it - electrolytics, etc. The trick is to take off
all the components you can (pray that the ICs are socketed), then put the
thing in on an Intensive (70 deg C IIRC) and leave it. When the dishwasher
finishes, take the board out and leave it in a warm cupboard for a week or
so, just to make sure it's dry. Reinstall the components, check for damage,
repair and power up.
Electrolube
"Fluxclene" and straight IPA are quite good. I've used 70% IPA
to remove light dirt from PCBs, Fluxclene is insanely aggressive. It doesn't
fizz or bubble, but it removes nearly anything - it's intended to be used to
remove solder flux. And it leaves most components and plastics intact.
Later.
--
Phil.
philpem(a)dsl.pipex.com
http://www.philpem.dsl.pipex.com/
Not sure if it's safe on circuit boards, but
I've used Simple Green
to wash the cases of computers with... worked great, no damage.
Yet another
solvent/cleaner that I can't find on this side of the "Big
Pond"...
I slathered
this board in contact cleaner and it didn't do anything.
The
Wasn't there a thread a while back in which someone mentioned washing
circuit boards in a dishwasher? grime just
remained. If I rub it with my bare fingers then it will
eventually start to rub off and leave little remainders like pencil
eraser droppings.
Several years ago, I used some sort of circuit board cleaner to
clean
up some very dirty circuit boards; not sure if I have any cans of this
left, but I'll check to see if I can find out what this was. 
1:17 p.m.
Is it small enough to fit in an ultrasonic cleaner? And how about a better
degreaser, like Purple Magic from AIM chemical? (This stuff might be too
harsh. It will damage soft rubber long term, and will strip the anodizing
finish from certain types of aluminum, such as that used on the flame
arrestors of my engines. I assume it's anodization, because it's the gold
color, and it's sure not paint).
--John
-----Original Message-----
From: cctalk-admin(a)classiccmp.org
[mailto:cctalk-admin@classiccmp.org]On
Behalf Of Vintage Computer Festival
Sent: Tuesday, February 11, 2003 21:49
To: Classic Computers Mailing List
Subject: Home to remove monumental grime?
Can anyone suggest a safe way to remove grime that is so old
and so thick
that the only way to remove it is to rub it off with your
bare fingers?
I slathered this board in contact cleaner and it didn't do
anything. The
grime just remained. If I rub it with my bare fingers then it will
eventually start to rub off and leave little remainders like
pencil eraser
droppings.
Any ideas?
--
Sellam Ismail Vintage
Computer Festival
--------------------------------------------------------------
----------------
International Man of Intrigue and Danger
http://www.vintage.org
* Old computing resources for business and academia at
www.VintageTech.com *
1:29 p.m.
On Tue, 11 Feb 2003, J.C.Wren wrote:
Is it small enough to fit in an ultrasonic cleaner?
And how about a better
degreaser, like Purple Magic from AIM chemical? (This stuff might be too
harsh. It will damage soft rubber long term, and will strip the anodizing
finish from certain types of aluminum, such as that used on the flame
arrestors of my engines. I assume it's anodization, because it's the gold
color, and it's sure not paint).
--John
Ultrasonic cleaners are a no-no for electronics, especially older non-plastic
chips and transistors with bond wires flapping in the breeze. These bond wires
can resonate at the ultrasonic frequency, fatigue, and fall of...
PCW
11:32 p.m.
At 10:14 PM 2/11/03 -0500, you wrote:
Is it small enough to fit in an ultrasonic cleaner?
I'd be REAL carefull of ultrasonic cleaners. I once let a friend of mine in the
USAF take one of my old model airplane ignition engines (a McCoy 48) and try to clean it
in an ultrasonic cleaner. The dammed thing vibrated the engine completely apart losing the
screws and some other small parts down the drain. It also removed the anodizing from the
aluminium castings! A lot of ICs don't have real good seals around their lids and
legs and I think there's a excellant chance that an ultrasonic cleaner would drive
solvent into the IC. Also you'd probaby lose an silkscreen lettering and a GOOD
ultrasonic cleaner may even loosen the copper foil fom the board.
Joe
12 Feb
12 Feb
9:40 a.m.
Can anyone suggest a safe way to remove grime that is
so old and so thick
that the only way to remove it is to rub it off with your bare fingers?
I slathered this board in contact cleaner and it didn't do anything. The
Waht cotnact cleaner did you use? I've found soaking the boards in fairly
pure propan-2-ol shifts a lot of gunge and doesn't harm the components.
-tony
2:32 p.m.
On Wed, 12 Feb 2003, Tony Duell wrote:
Waht cotnact cleaner did you use? I've found
soaking the boards in
fairly pure propan-2-ol shifts a lot of gunge and doesn't harm the
components.
Isohexane 107-83-5, n-Hexane 110-54-3, Methanol 67-56-1, Petroleum
Distillate 64742-48-9, Carbon Dioxide 124-38-9.
Commercial trade name is CRC QD Contact Cleaner.
Sellam Ismail Vintage Computer Festival
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International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
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ard＠p850ug1.demon.co.uk -
foo＠siconic.com -
jcwren＠jcwren.com -
pcw＠mesanet.com -
philpem＠dsl.pipex.com -
rdd＠rddavis.org -
rigdonj＠cfl.rr.com -
vcf＠siconic.com