5 Nov
2001
5 Nov
'01
8:16 a.m.
HP recommends a plain old water (a damp cloth) to
clean printer rollers. I
just cleaned the rollers on my DeskJet 820ce and the paper feed is much
improved. It remains to be seen how long it lasts this way, though.
Cleaning isn't the issue- deglazing is. Rubber rollers become
glazed on their surface, and whether it's from picking up dirt
and dust or because the rubber simply fuses chemically at the
surface I don't know. But traditionally, cerbon tetrachloride
was used for this purpose. I also used it to highlight watermarks
in vintage postage stamps.
Regards,
-dq
5 Nov
5 Nov
9:10 a.m.
Carbon Tetrachloride is what Carbona spot remover was. I think they've
either outlawed it or just taken it from the market for consumers.
-> -----Original Message-----
-> From: owner-classiccmp(a)classiccmp.org
-> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Douglas Quebbeman
-> Sent: Monday, November 05, 2001 4:16 PM
-> To: 'classiccmp(a)classiccmp.org'
-> Subject: RE: Rubber Restorer...
->
->
-> > HP recommends a plain old water (a damp cloth) to clean
-> printer rollers. I
-> > just cleaned the rollers on my DeskJet 820ce and the paper feed is much
-> > improved. It remains to be seen how long it lasts this way, though.
->
-> Cleaning isn't the issue- deglazing is. Rubber rollers become
-> glazed on their surface, and whether it's from picking up dirt
-> and dust or because the rubber simply fuses chemically at the
-> surface I don't know. But traditionally, cerbon tetrachloride
-> was used for this purpose. I also used it to highlight watermarks
-> in vintage postage stamps.
->
-> Regards,
-> -dq
->
9:48 a.m.
Carbon Tetrachloride is what Carbona spot remover was.
I think they've
either outlawed it or just taken it from the market for consumers.
I seem to remember carbon tetrachloride is a carcinogen.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
3:25 p.m.
On Mon, 5 Nov 2001, Eric Dittman wrote:
So they say. It also has some other nifty qualities like forming
phosgene gas (think WW-I) when applied to a hot surface.
- don
Carbon
Tetrachloride is what Carbona spot remover was. I think they've
either outlawed it or just taken it from the market for consumers.
I seem to remember carbon tetrachloride is a carcinogen. --
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
10:52 p.m.
Carbon Tetrachloride is what Carbona spot remover was.
I think they've
either outlawed it or just taken it from the market for consumers.
I seem to remember carbon tetrachloride is a carcinogen.
11:48 p.m.
Hard to find anymore unless you go to a large chain or specialty shop but
they have the chemicals that are needed for some showy experiments liek
sticking broken glass together, turning two clear liquids to a red, etc but
most of the "real cool" things like sulfur, pot. ferrocyanide,
hydrochloric/sulfuric acids (or hydrogen peroxide for that) are all removed.
About the most dangerous now is 5% acetic acid (vinegar) and sodium bicarb.
Ooh that's neat....lets do what happens inside dad's gut when he takes alka
selter after eating too much. BORING.
My set (many parts still in a box at my parent's) had neat stuff that I
could make gunpowder, eat through metal with a semi strong acid, etc. It was
a Gilbert branded set - wonder if they're even in business yet?
FWIW my cousin never hurt himself as a kid with all the crap we mixed - he
waited until he was dault and while bleaching the toilet (poured bleach in
the water and let it sit - we all do this) he was done mopping his kitchen
and wanted to dump the old AMMONIA water...
Duh-duh-duh...duh-duh-duh-duh-daaa (just the facts ma'am) - he had chemical
burns to his eyes, nose throat and lungs. Took nearly a year for most of it
to heal completely and they said that if he had gone to take a nap and the
chlorine gas built up it could have killed him.
-> -----Original Message-----
-> I remember old chemistry sets came with sodium ferrocyanide. The
-> bottles all said "DO NOT MIX WITH ACID" with no explanation given,
-> which probably lead to a few children trying it to see what happens.
->
-> Fortunately the acids available in the chemistry sets weren't very
-> concentrated, as a strong acid mixed with sodium ferrocyanide can
-> produce cyanide gas, esp. when the solution is exposed to heat or
-> direct sunlight. Also fortunate is the bond between the iron and
-> the cyanide in sodium ferrocyanide is very strong.
->
-> I wonder if children's chemistry sets still come with all the
-> interesting chemicals?
-> --
-> Eric Dittman
-> dittman(a)dittman.net
-> Check out the DEC Enthusiasts Club at http://www.dittman.net/
->
6 Nov
6 Nov
3:40 a.m.
On Tue, 6 Nov 2001, Eric Dittman wrote:
Fortunately the acids available in the chemistry sets
weren't very
concentrated,
But any kid knows that you can get some better acid out of the car
battery.
I wonder if children's chemistry sets still come
with all the
interesting chemicals?
Not a chance. The more modern sets have half a dozen varieties of
food-coloring (and "experiments" of watching it dissipate in a jug of
water).
There will never be any more great chemists who started out with a
chemistry set.
BTW, the primary maker of the sets (back when they were REAL) was
GILBERT. They're the same folks who brought you Erector (R) sets.
For the yery young here:
Erector sets were a BIG box of small pieces of metal, with nuts, bolts,
axles, gears, electric motor, etc. Still a great prototyping system.
(One of the PcJRs that I sold at VCF came from IBM as a diskless system -
the drive mounted in it was mounted with Erector set pieces.)
But,.. in our litigious society obsessed with liability, they removed all
of the swallowable sized pieces, all of the metal parts, all of the brass
gears, the 110V motor, ...
There will never be any more great mechanics/mechanical engineers who
started out with an Erector set.
Hmmm. Are there any "Electrical Sets" that are worthy of the name?
--
Grumpy Ol' Fred cisin(a)xenosoft.com
NOTE: My ISP is having some problems. If you have difficulty reaching me
at this e-mail address, you can leave a message at:
fcisin(a)merritt.edu
cisin(a)info.sims.berkeley.edu
7:19 a.m.
On Tue, Nov 06, 2001 at 09:40:49AM -0800, Fred Cisin (XenoSoft) wrote:
Erector sets were a BIG box of small pieces of metal,
with nuts, bolts,
axles, gears, electric motor, etc. Still a great prototyping system.
(One of the PcJRs that I sold at VCF came from IBM as a diskless system -
the drive mounted in it was mounted with Erector set pieces.)
Ha, you try to post off-topic messages and they become on-topic again.
Several differential analyzers were built out of Meccano parts -- Meccano
being the British version of the Erector set. You probably couldn't do it
with just one box, though.
http://www.maths.irl.cri.nz/history/contents.html
http://www.maths.irl.cri.nz/history/analyser.jpg
http://www.voyager.co.nz/~abe/NZ/earnz1.htm
http://www.freenet.edmonton.ab.ca/meccano/mecint.html
-- Derek
8:21 a.m.
most kids now don't even know that a car has a battery - they barely know
what the lever marked "hood" is for.
-> -----Original Message-----
-> On Tue, 6 Nov 2001, Eric Dittman wrote:
-> > Fortunately the acids available in the chemistry sets weren't very
-> > concentrated,
->
-> But any kid knows that you can get some better acid out of the car
-> battery.
9:29 a.m.
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10:02 a.m.
At 11:29 PM 11/6/01 +0000, Tony Duell wrote:
They are labelled
'Not a toy, for use only under adult supervision'. I am still trying to
work out how somebody could seriously harm themselves with one of these
kits, unless they were a Darwin Awards candidate anyway...
Maybe - just maybe - a kid could get a tingle from
a self-chopping step-up transformer or relay...
Then again, even just a few volts might tingle if you
stick two wires in your eye, if you ignored the pain
of the wire in your eye and concentrated on the juice.
On the other off-topic, I was introduced to "poutine" by
some programmers I met while on site at a programming job
in Quebec City. Being from Wisconsin, the mixture of
fried potatoes, cheese curds and gravy seemed right at home.
Around here, people go to great lengths to buy very fresh
cheese curds. They must squeak when you bite 'em.
- John
10:25 a.m.
At 11:29 PM 11/6/01 +0000, Tony Duell wrote:
They are labelled
'Not a toy, for use only under adult supervision'. I am still trying to
work out how somebody could seriously harm themselves with one of these
kits, unless they were a Darwin Awards candidate anyway...
Did they give you enough wire to wind a transformer?
Connect to the mains?
I'd bet that Tony could figure out a way to make something lethal out of
what they provided.
10:49 a.m.
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8 Nov
8 Nov
6:19 a.m.
Tony Duell skrev:
> I'd bet that Tony could figure out a way to
make something lethal out of
> what they provided.
Difficult. Getting sufficient current at a few hundred
volts is not going
to be really possible using only miniature audio transformers. If I'm
allowed other parts then it's trivial, but then I wouldn't need the kit
in the first place...
"It's Tony-proof!"
--
En ligne avec Thor 2.6a.
Kimagure Orange Road inneh?ller v?ldigt mycket ton?rsromantik, extremt mycket
ton?rsromantik faktiskt. Men det ?r samtidigt en av de st?rsta klassikerna
inom shojo, kanske till och med den absolut st?rsta.
- Animanga.nu
6 Nov
6 Nov
10:41 a.m.
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7 Nov
7 Nov
5:27 a.m.
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
As I said, doubtless a Darwin Awards candidate could
find some way to
harm himself with the kit (swallowing parts of it would be one way).
As I said in another post - "Do Not Lick" ;-)
-ethan
__________________________________________________
Do You Yahoo!?
Find a job, post your resume.
http://careers.yahoo.com
6:36 a.m.
Ethan Dicks wrote:
--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote:
Thats the guy with "Can read but to stupid to do so!" stamped on his
forehead.
Ben Franchuk.
--
Standard Disclaimer : 97% speculation 2% bad grammar 1% facts.
"Pre-historic Cpu's" http://www.jetnet.ab.ca/users/bfranchuk
As I said, doubtless a Darwin Awards candidate
could find some way to
harm himself with the kit (swallowing parts of it would be one way).
As I said in another post - "Do Not Lick" ;-)
6 Nov
6 Nov
10:04 a.m.
> But any kid knows that you can get some better
acid out of the car
> battery.
On Tue, 6 Nov 2001, Tony Duell wrote:
Alas many car batteries (at least in the UK) are
'sealed for life' so
it's less easy to extract some sulphuric acid, at least not without
damaging the battery enough to get noticed :-(.
In the US, MOST of the "sealed" batteries actually have access holes into
each cell, that are hidden under a cap or tape.
But,.. in our
litigious society obsessed with liability, they removed all
of the swallowable sized pieces, all of the metal parts, all of the brass
gears, the 110V motor, ...
What ever could be left :-(
5:54 a.m.
I wonder if
children's chemistry sets still come with all the
interesting chemicals?
Nope, no potassium perchlorate, potassium nitrate, but plenty of sodium
laurel sulfate.
8:21 a.m.
Can't be any worse than the potassium dichromate I used for 2 yrs in silk
screen making in the mid 70's and came home with dark yellow (jaundiced look
to them) hands. Had all the goodies in my sets too but that was a day when
parents supervised without you knowing you were supervised, unlike our
present day hand-holding way of teaching new things. I had a pirahna in my
aquarium, dad said don't mess with it. Got a chunk of skin ripped off of my
index finger by not listening - learned to listen from them on, at least
about pirahnas. Now you can't even have them in most places (I have a
mother-in-law I'd love to have play with about a swimming pool of them)
-> -----Original Message-----
-> From: owner-classiccmp(a)classiccmp.org
-> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Eric Dittman
-> Sent: Tuesday, November 06, 2001 1:54 PM
-> To: classiccmp(a)classiccmp.org
-> Subject: Re: Rubber Restorer...
->
->
-> > >I wonder if children's chemistry sets still come with all the
-> > >interesting chemicals?
-> >
-> > Nope, no potassium perchlorate, potassium nitrate, but plenty of sodium
-> > laurel sulfate.
->
-> No iodine crystals, either, I take it?
->
-> NB: If you don't know what you could do with these you probably
-> had a much
-> safer childhood.
-> --
-> Eric Dittman
-> dittman(a)dittman.net
-> Check out the DEC Enthusiasts Club at http://www.dittman.net/
->
8:52 a.m.
Potassium dichromate is a slow-action carcinogen. Potassium percholate
would end your life a *lot* quicker.
Peace... Sridhar
On Tue, 6 Nov 2001, Russ Blakeman wrote:
Can't be any worse than the potassium dichromate I
used for 2 yrs in silk
screen making in the mid 70's and came home with dark yellow (jaundiced look
to them) hands. Had all the goodies in my sets too but that was a day when
parents supervised without you knowing you were supervised, unlike our
present day hand-holding way of teaching new things. I had a pirahna in my
aquarium, dad said don't mess with it. Got a chunk of skin ripped off of my
index finger by not listening - learned to listen from them on, at least
about pirahnas. Now you can't even have them in most places (I have a
mother-in-law I'd love to have play with about a swimming pool of them)
-> -----Original Message-----
-> From: owner-classiccmp(a)classiccmp.org
-> [mailto:owner-classiccmp@classiccmp.org]On Behalf Of Eric Dittman
-> Sent: Tuesday, November 06, 2001 1:54 PM
-> To: classiccmp(a)classiccmp.org
-> Subject: Re: Rubber Restorer...
->
->
-> > >I wonder if children's chemistry sets still come with all the
-> > >interesting chemicals?
-> >
-> > Nope, no potassium perchlorate, potassium nitrate, but plenty of sodium
-> > laurel sulfate.
->
-> No iodine crystals, either, I take it?
->
-> NB: If you don't know what you could do with these you probably
-> had a much
-> safer childhood.
-> --
-> Eric Dittman
-> dittman(a)dittman.net
-> Check out the DEC Enthusiasts Club at http://www.dittman.net/
->
8:32 a.m.
What a kid's chemistry kit needs is ethyl hexaperchlorate. And Caesium
metal stored in kerosene. Fun fun fun fun fun.
Peace... Sridhar
On Tue, 6 Nov 2001, Eric Dittman wrote:
No iodine crystals, either, I take it?
NB: If you don't know what you could do with these you probably had a much
safer childhood.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
I wonder if children's chemistry sets still come
with all the
interesting chemicals?
Nope, no potassium perchlorate, potassium nitrate, but plenty of sodium
laurel sulfate. 
4:50 p.m.
No iodine crystals, either, I take it?
NB: If you don't know what you could do with these you probably had a much
safer childhood.
Ammonium triiodide isn't so dangerous. I had some kind of chemistry for the
farm book with stuff like how to make fulminate of mercury and more serious
stuff.
7 Nov
7 Nov
12:09 a.m.
New subject: Rubber Restorer...u
NB: If you
don't know what you could do with these you probably had a much
safer childhood.
Ammonium triiodide isn't so dangerous. I had some kind of chemistry for the
farm book with stuff like how to make fulminate of mercury and more serious
stuff.
12:09 a.m.
No iodine
crystals, either, I take it?
NB: If you don't know what you could do with these you probably had a much
safer childhood.
Ammonium triiodide isn't so dangerous. I had some kind of chemistry for the
farm book with stuff like how to make fulminate of mercury and more serious
stuff.
5:34 a.m.
Probably the most dangerous thing I've done in a chemistry lab is the
distillation of diazomethane.
Peace... Sridhar
On Wed, 7 Nov 2001, Eric Dittman wrote:
Ammonium tri-iodide can be dangerous if mishandled. There's also the
common mis-belief that it is safe when wet.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
No iodine crystals, either, I take it?
NB: If you don't know what you could do with these you probably had a much
safer childhood.
Ammonium triiodide isn't so dangerous. I had some kind of chemistry for the
farm book with stuff like how to make fulminate of mercury and more serious
stuff. 
7:40 a.m.
I remember a chem. instuctor in 1st year Sci who overheated some in a
demo lab instuction class and filled the 300 seat lecture room with thick
purple smoke necessitating it's evacuation. It was hilarious.
I've often wondered if he hadn't done it on purpose, as he was an amusing
instructor with a Columbo-like personality.
Lawrence
No iodine crystals, either, I take it?
NB: If you don't know what you could do with these you probably had a much
safer childhood. -- Eric Dittman dittman(a)dittman.net Check out the DEC
Enthusiasts Club at http://www.dittman.net/
Reply to:
lgwalker(a)mts.net
I wonder if children's chemistry sets still come
with all the
interesting chemicals?
Nope, no potassium perchlorate, potassium nitrate, but plenty of sodium
laurel sulfate.
6 Nov
6 Nov
10:50 a.m.
On Tue, 6 Nov 2001, Eric Dittman wrote:
So they say. It also has some other nifty qualities like forming
phosgene gas (think WW-I) when applied to a hot surface.
I wonder how many accidental poisonings occurred?
A number, I would imagine, and especially in tight quarters. I got
exposed to some briefly during the `40s when the paper wrapping on some
decorative steel plate caught fire and the people nearest used a Carbon
Tet extinguisher to put it out. Rather pungent as I recall, so it does
provide some warning.
Also in that same era we used to degrease various components of
Resnatron Radar jamming with carbon tet and acetone bare handed. No one
thought a thing of it except for the way it degreased your hide!
- don
Carbon
Tetrachloride is what Carbona spot remover was. I think they've
either outlawed it or just taken it from the market for consumers.
I seem to remember carbon tetrachloride is a carcinogen. I remember old chemistry sets came with sodium
ferrocyanide. The
bottles all said "DO NOT MIX WITH ACID" with no explanation given,
which probably lead to a few children trying it to see what happens.
Fortunately the acids available in the chemistry sets weren't very
concentrated, as a strong acid mixed with sodium ferrocyanide can
produce cyanide gas, esp. when the solution is exposed to heat or
direct sunlight. Also fortunate is the bond between the iron and
the cyanide in sodium ferrocyanide is very strong.
I wonder if children's chemistry sets still come with all the
interesting chemicals?
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
2:30 p.m.
Dang Don, you really go way back huh? I wasn't around until the late 50's so
you could likely be my real dad huh (grin). I used to kid with the
smartassed GI students of mine about where their moms were around the time
of their comception - especially if their moms were from northern IL or
southern WI (although I was more interested in "stuff" than "muff" at
the
time.
-> -----Original Message-----
-
-> A number, I would imagine, and especially in tight quarters. I got
-> exposed to some briefly during the `40s when the paper wrapping on some
-> decorative steel plate caught fire and the people nearest used a Carbon
-> Tet extinguisher to put it out. Rather pungent as I recall, so it does
-> provide some warning.
->
-> Also in that same era we used to degrease various components of
-> Resnatron Radar jamming with carbon tet and acetone bare handed. No one
-> thought a thing of it except for the way it degreased your hide!
5 Nov
5 Nov
10:56 p.m.
Alright! I need to get some to clean my neighbor's radiator :-)
-> -----Original Message-----
-> Sent: Monday, November 05, 2001 11:25 PM
-> To: classiccmp(a)classiccmp.org
-> Subject: Re: Rubber Restorer...
-> On Mon, 5 Nov 2001, Eric Dittman wrote:
->
-> > > Carbon Tetrachloride is what Carbona spot remover was. I
-> think they've
-> > > either outlawed it or just taken it from the market for consumers.
-> >
-> > I seem to remember carbon tetrachloride is a carcinogen.
->
-> So they say. It also has some other nifty qualities like forming
-> phosgene gas (think WW-I) when applied to a hot surface.
->
-> - don
->
-> > --
-> > Eric Dittman
-> > dittman(a)dittman.net
-> > Check out the DEC Enthusiasts Club at http://www.dittman.net/
-> >
->
->
8446
days inactive
8449
days old
30 comments
15 participants
participants (15)
-
ard＠p850ug1.demon.co.uk -
bfranchuk＠jetnet.ab.ca -
cisin＠xenosoft.com -
dhquebbeman＠theestopinalgroup.com -
dittman＠dittman.net -
donm＠cts.com -
dpeschel＠eskimo.com -
erd_6502＠yahoo.com -
jfoust＠threedee.com -
lgwalker＠mts.net -
mikeford＠socal.rr.com -
optimus＠canit.se -
rhblakeman＠kih.net -
spectre＠stockholm.ptloma.edu -
vance＠ikickass.org