Red Glyptal
Richard Karlquist
Can anyone tell me where to buy "Red Glyptal", which is
a red "paint" that is used to mark adjustment screws to
indicate if they have been tampered with. An associate
seems to remember that a company called Markel used to
make a pen that had a clever applicator that puts one
drop on the screw.
Rick Karlquist
rka...@scd.hp.com
JoseSainz
>Subject: Red Glyptal
>From: rka...@scd.hp.com (Richard Karlquist)
>Date: 31 Jul 1997 22:59:43 GMT
>Message-ID: <5rr5cv$m...@hpscit.sc.hp.com>
Glyptal is still available. I used some 3 years ago for a job, but had to
buy it in gallon quantities.
If you are seeking to permanently prevent change of a pot setting, simple
nail polish works.
If you wish to reversibly prevent change of a pot setting then Elmer's
Glue in day-glo colors works very well. It lasts for 3-4 years in a 1 oz
dispeser. It may be found at art shops. It comes in pink, blue and
green.
José
Douglas P. McNutt
In Article <5rr5cv$m...@hpscit.sc.hp.com>, rka...@scd.hp.com (Richard
Karlquist) wrote:
>
>Can anyone tell me where to buy "Red Glyptal", which is
>a red "paint" that is used to mark adjustment screws to
>indicate if they have been tampered with.
I'm looking at a pint can of Glyptal brand 1201 Red Enamel which hasn't been
opened in over a decade. I have no idea what the interior condition is. It
came from General Electric, Chemical Materials Dept, Schnectady, NY.
It's last use was a last ditch sealant for vacuum systems which refused to
stop leaking, but I think GE considered it an insulating varnish for the
likes of high voltage transformer windings.
-> From the USA. The only socialist country that refuses to admit it. <-
Sam Goldwasser
It is great for vacuum systems but they end up looking pretty weird after
you get a little carried away (and then find that the leak was in a valve
or something :-) ;-(.
--- sam : Sci.Electronics.Repair FAQ: http://www.paranoia.com/~filipg/REPAIR/
Coming soon to a computer screen near you: http://www.repairfaq.org/
Preview of V3.00 (ASCII): http://www.pacwest.net/byron13/sammenu.htm
K.J. Kirwan
GC Electronics sells "Red GLPT Insulating Varnish":
2 fl.oz. bottle w/ brush. Cat. No. 10-9002
(N.S.N. 5970-00-901-5331)
2 fl.oz. bottle w/ brush (carded). Cat. No. 10-9003
8 oz. can Cat. No. 10-9008
1 gal. can Cat. No. 10-9009
Description in catalog:
Alkyd-based compound especially resistant to environmental extremes
including oils, water, and most acids and alkalis. Retains its high
dielectric strength even if wet and is, therefore, especially adaptible
to the insulation of electrical and electronic devices or components
which may be operated in a very humid climate and up to 250F (121C).
For general insulation of coils, transformers, motor windings, and for
all-around protection against oxidation and atmospheric attacks.
Many electronics supply stores carry GC products.
Ask them (1-800-435-2931) if there is a dealer nearby.
Hope this helps.
Ted Davis
On 31 Jul 1997 22:59:43 GMT, rka...@scd.hp.com (Richard Karlquist)
wrote:
>
>Can anyone tell me where to buy "Red Glyptal", which is
>a red "paint" that is used to mark adjustment screws to
>indicate if they have been tampered with. An associate
>seems to remember that a company called Markel used to
>make a pen that had a clever applicator that puts one
>drop on the screw.
>
I haven't bought any in so long that I hesitate to say anything about
that - however, for most purposes, cheap fingernail polish works well
enough. We try to get a color that is close enough to plain red to
pass for the real thing. We do several hundred screw heads each
semester, and a single bottle is about the right amount - hardly any
waste and no hassle transfering small amounts from the large can to
the working bottle or applicator. We also have the problem that we
would have to register a can of paint with the hazardous material
control people who would then come over and bar code the can (or start
a new can each day, throwing the old one away each evening and buying
a fresh one the next morning), but we don't have to register the nail
polish (we can just claim it as personal grooming supplies for one of
our techs or say we borrowed it from one of the secretaries). I
should emphasize "cheap" nail polish - the expensive stuff doesn't
work as well for the task at hand but the cheap stuff is little more
than colored lacquer, which is what is really needed anyway.
Winfield Hill
Ted Davis, <xtd...@gearbox.maem.umr.edu> said...
>
> rka...@scd.hp.com (Richard Karlquist) wrote:
>
> >Can anyone tell me where to buy "Red Glyptal", which is
> >a red "paint" that is used to mark adjustment screws to
> >indicate if they have been tampered with.
>
> that - however, for most purposes, cheap fingernail polish works well
> enough. We try to get a color that is close enough to plain red to
> pass for the real thing.
True, most people seem to use fingernail polish these days. However, it's
getting harder and harder to get the traditional red. Most colors nowadays
are odd shades more suited to the other-half's idea of attractive. Come to
think of it, mine as well - I wouldn't want my wife using "trimpot" red!
Now about those conversations with the lady at the cosmetics counter...
--
Winfield Hill hi...@rowland.org _/_/_/ _/_/_/_/
The Rowland Institute for Science _/ _/ _/_/ _/
Cambridge, MA USA 02142-1297 _/_/_/_/ _/ _/ _/_/_/
_/ _/ _/ _/ _/
http://www.artofelectronics.com/ _/ _/ _/_/ _/_/_/_/
Kendall Castor-Perry
In article <5s0h7q$h...@fridge-nf0.shore.net>, Winfield Hill
<hi...@rowland.org> writes
> Now about those conversations with the lady at the cosmetics counter...
>
Win - I got no joy from the lady on the Estee Lauder counter when I
asked her what the solubility of diallyl phthalate and allyl-butyl
styrene copolymer resins were in the typical mix of acetone and amyl
acetate they used in their nail varnish.
I mean, what do they *teach* these kids on the standard Applied
Cosmetics & Microelectronics courses these days?
OK, OK, I know it's probably somewhere in AoC by Rubenstein & Factor...
--
Kendall Castor-Perry
Ben Allgor
rka...@scd.hp.com (Richard Karlquist) wrote:
>Can anyone tell me where to buy "Red Glyptal", which is
>a red "paint" that is used to mark adjustment screws to
>indicate if they have been tampered with. An associate
>seems to remember that a company called Markel used to
>make a pen that had a clever applicator that puts one
>drop on the screw.
>Rick Karlquist
>rka...@scd.hp.com
Red Glyptal Insulating Varnish is made by General Cement. See page
781 of the Allied Catalog for a 2 oz bottle. Allied pn 796-3670, GC #
10-9002.
Ben Allgor
Isaac Wingfield
In article <5s0h7q$h...@fridge-nf0.shore.net>, hi...@rowland.org (Winfield
Hill) wrote:
>Ted Davis, <xtd...@gearbox.maem.umr.edu> said...
>>
>> rka...@scd.hp.com (Richard Karlquist) wrote:
>>
>> >Can anyone tell me where to buy "Red Glyptal", which is
>> >a red "paint" that is used to mark adjustment screws to
>> >indicate if they have been tampered with.
>>
From memory long unused, "Glyptal" is the name GE used (or uses) for a
*line* of insulating coatings; it's not just one compound. In college, we
bought surplus a 5-gallon can of what we thought was the thick,
high-voltage insulation; when we opened it, we found something that was the
right color, but thin enough to paint a floor with. Worthless.
Used to be able to but small bottles of one kind in "Radio-TV" parts stores
-- it was used to repair the HV sections of TV receivers.
Otherwise, I'd call GE.
Isaac
Daniel Haude
Winfield Hill (hi...@rowland.org) wrote:
> I can't speak for Ted, but tradition dictates a certain shade of red.
> Ha! We can't describe it but we can recognize it. And a shimmering
> green or pink just isn't acceptable!
Being a traditionalist myself, I fully accept and support this reasoning.
I know just that exact shade of red (the Eastern block industry, by the
way, used to have a red sealant that was just a trifle nicer than ours).
Heck, if I had to fix a screw that loosens all the time (or gets tampered
with), and I just simply HAD to seal it, and if pink nail varnish were ALL I
had, I still wouldn't do it, you can bank on that!
--
Daniel Haude /--------------------------------------
Institut fuer Angewandte Physik /
Universitaet Hamburg / ha...@physnet.uni-hamburg.de
---------------------------------/
Roy McCammon
Walter Gray wrote:
>
> In article <5s9cqa$ntd$1...@rzsun02.rrz.uni-hamburg.de>, HA...@alpha5.physnet.uni-hamburg.de (Daniel Haude) writes:
> :Ted Davis (xtd...@gearbox.maem.umr.edu) wrote:
> :>We try to get a color that is close enough to plain red to
> :>pass for the real thing. We do several hundred screw heads each
> :>semester, and a single bottle is about the right amount - hardly any
> :>waste and no hassle transfering small amounts from the large can to
> :>the working bottle or applicator.
> :What do you need it for anyway? Why would the stuff have to "pass for the
> :real thing" (which sounds as if it not only has to keep the screws in
> :place, but also has to look "right" -- whom are you trying to cheat ;-)?
> :
> :Just curious:
>
> It's not to keep the screws in place, but to provide evidence of
> tampering. Though I would have thought that a professional
> tamperer would also replace the glyptal, probably with nail varnish.
Long ago when I was but a youngster, I worked for small company that
build special purpose precision measurement equipment. There were
lots of pots that were sealed with red stuff. Then, the gray heads
that were in charge discovered that pots with red stuff on them were
more likely to need to be readjusted than those without. It was
speculated that the red stuff shrunk or expanded as it cured and
that was enough to cause a significant change. I don't know, but
we quit using red stuff all together. I don't know whether we used
glyptol or fingernail polish.
Opinions expressed herein are my own and may not represent those of my employer.
Walter Gray
In article <33EB1E...@mmm.com>, rbmcc...@mmm.com (Roy McCammon) writes:
Whenever I see a sealed adjustment, my fingers start twitching...
Walter
BTW, ever seen white sealant? I'm sure it was on trimmer caps
on some US-built WW2 radio equipment.
Bill Eichin
suspended in xylol (in other words, Glyptal) for "locking" pots and to
provide evidence of tampering. We've also used nail polish, but far
less often. However, we occasionally use "tamper sealant," a bright
orange goop that's slightly elastic. It doesn't prevent adjustment,
like glyptal can, but it makes it very clear when a pot tweaker has been
placed in it (the "evidence of tampering"). You can safely use it on
open-air trim caps, as well, without it leaking in and changing the
dielectric constant of the cap!
--Bill
E.