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<DIV>toluene....hmm a major component of air fresheners, perfumes, deoderants,
wall fresheners, car magic tree's</DIV>
<DIV> </DIV>
<DIV>hmm no wonder they all give me a rotten headache!</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=couryhouse@aol.com
href="mailto:couryhouse@aol.com">couryhouse@aol.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=quadlist@quadvideotapegroup.com
href="mailto:quadlist@quadvideotapegroup.com">quadlist@quadvideotapegroup.com</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, January 15, 2010 12:32
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [QuadList] Toluene</DIV>
<DIV><BR></DIV><FONT id=role_document face=Arial color=#000000 size=2>
<DIV>Xylene, Toluene, Trichloretylene all this stuff will give ya cancer
or drop your liver out of your body be careful my friends!</DIV>
<DIV> </DIV>
<DIV><FONT size=2 PTSIZE="10">
<DIV>ed#</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 1/14/2010 3:55:53 P.M. US Mountain Standard Time, <A
href="mailto:park@videopark.com">park@videopark.com</A> writes:</DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT
style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>A
couple of points about head clogs.
<DIV><BR></DIV>
<DIV>Oxide and binder comes off tape. Even if you look at an audio machine,
you can see oxide/binder on the heads and guides that came from the oxide
side of the tape.</DIV>
<DIV><BR></DIV>
<DIV>We have found that baking the tape (both audio and video) lessens or
eliminates oxide and backcoating shedding (SSS - Sticky Shed Syndrome). SSS
is caused <SPAN class=Apple-style-span
style="FONT-SIZE: 13px; LINE-HEIGHT: 19px; FONT-FAMILY: sans-serif">by
absorption of moisture into the binder of the tape, making it
sticky.</SPAN></DIV>
<DIV><BR></DIV>
<DIV>Yes, you need to clean the heads on a quad to remove the oxide layer.
When cleaning, you can see the oxide on your cleaning cloth. The oxide and
binder material would short out the gap of the head or lessen its
penetration into the tape due to buildup on the head surface.</DIV>
<DIV><BR></DIV>
<DIV>The official Amex Head Cleaner was made from Xylene, not Toluene.</DIV>
<DIV><BR></DIV>
<DIV>"The recommended solvent is Ampex Head Cleaner (Cat 087-007) which is
composed of 98% and a dash of "Kodaflow", which is a wetting agent
intended to enhance the flow of the solvent in restricted areas."<BR><BR>I
understand <FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px">the TCE is to speed up evaporation. I don't remember
seeing any other chemical recommended by Ampex. Alcohol was the suggestion
for cleaning the pinch roller. </SPAN></FONT></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px">In modern VTRs like Digital Betacam that uses metal
tape, a cleaning tape is necessary to remove metal particles that get
imbedded in the heads since regular chemistry will not dissolve the metal
particles. Sony recommends using a cleaning tape for five seconds every 50
hours of use.</SPAN></FONT></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px">Tape binders were/are made from polymers like
polyvinyl chloride, polyurethane resin and a copolymer of vinylidene
chloride and acrylonitrile, </SPAN></FONT><SPAN class=Apple-style-span
style="LINE-HEIGHT: 14px"><FONT class=Apple-style-span size=3><SPAN
class=Apple-style-span style="FONT-SIZE: 12px">polyester urethane and the
like. I don't think any tape ever used Latex (rubber) as a
binder.</SPAN></FONT></SPAN></DIV>
<DIV><FONT class=Apple-style-span size=3><SPAN class=Apple-style-span
style="FONT-SIZE: 12px"><BR></SPAN></FONT>
<DIV><SPAN class=Apple-style-span
style="WORD-SPACING: 0px; FONT: medium Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; WIDOWS: 2; ORPHANS: 2; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px"><SPAN
class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; WIDOWS: 2; ORPHANS: 2; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px">
<DIV
style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space"><SPAN
class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; WIDOWS: 2; ORPHANS: 2; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto">
<DIV
style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space"><SPAN
class=Apple-style-span
style="WORD-SPACING: 0px; FONT: 12px Helvetica; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; WIDOWS: 2; ORPHANS: 2; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto">
<DIV>
<DIV>The old "thumbnail" trick on Quad was to loosen any foreign matter and
the 14,000 rpm speed of the head would throw it off.</DIV>
<DIV><BR></DIV>
<DIV>The 3M tape reels that had the foam on one flange had a problem of glue
migrating through the foam and onto the tape. The glue did not come from the
tape since after transferring the tape to a clean reel, the reel remained
clean.</DIV>
<DIV><BR class=Apple-interchange-newline>Best,</DIV>
<DIV>Park</DIV>
<DIV><BR></DIV></DIV>
<DIV>C. Park Seward</DIV>
<DIV>Visit us: <A title=http://www.videopark.com/
href="http://www.videopark.com/">http://www.videopark.com</A></DIV><BR
class=Apple-interchange-newline></SPAN></DIV></SPAN></DIV></SPAN><BR
class=Apple-interchange-newline></SPAN><BR
class=Apple-interchange-newline></DIV><BR>
<DIV>
<DIV>On Jan 14, 2010, at 12:30 PM, <A title=mailto:georgenann@aol.com
href="mailto:georgenann@aol.com">georgenann@aol.com</A> wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite"><FONT face=arial color=black size=2>
<DIV style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: helvetica,arial">
<DIV id=AOLMsgPart_2_552fcb31-37be-4164-8a61-96b4a527b3b1><FONT face=arial
color=black size=2>
<DIV id=AOLMsgPart_2_0c3a50fb-9a98-4997-8143-3522f608becf><FONT face=arial
color=black size=2>
<DIV><FONT face="Arial, Helvetica, sans-serif">I think there are many
people who are under the impression that "Head Clogs" come from oxide
being stuck in the gap of the heads.</FONT></DIV>
<DIV> </DIV>
<DIV>I'm not sure this is the case. There may be some instances of
this, but one of the common cures for an "On Air" head clog is putting
your thumbnail against the head, which works most of the time. Seems
to me that would tend to push anything into the head, not out of it.</DIV>
<DIV> </DIV>
<DIV>I think it is more a case of the latex binder oozing from the
tape and sticking to the head rim, causing "Rim Buildup" and keeping the
tape away from the head.</DIV>
<DIV> </DIV>
<DIV>One of the other "Cures" for this is squirting Freon (TF) into the
head while it is running. In this case, Freon is a refrigerant and due to
the high speed of the head immediately freezes the latex and it breaks
off, there is such a small amount of it you would hardly notice it,
thereby relieving the problem.</DIV>
<DIV> </DIV>
<DIV>This "Oozing" of the latex binder has become quite obvious over the
past number of years with the older 2" tapes. It is all over the
place. In a few minutes of playing a tape, there may be a buildup of
this latex on the audio stack, full erase head, (Don't forget that is on
the back of the tape) fixed guides and all over the vac cols, stuck to the
glass and the entrance and exit guides thereof. This will cause the
machine to just STOP! This is also a big problem on 2000's and
1200's. One can actually feel the stuff, even on the head wheel
where it causes "Head Clogs". In the AVR-1's one can also feel the
stuff on the glass in the vac cols. </DIV>
<DIV> </DIV>
<DIV>
<DIV>The only thing to do is stop and clean the stuff off of
everything.</DIV></DIV>
<DIV> </DIV>
<DIV>Years ago, I thought I would try cleaning it up with some "Rubber
Cement Thinner" which had been in a closet in one of the secretary's
offices. It did the trick. </DIV>
<DIV> </DIV>
<DIV>Later, one of my neighbors who worked for "Tessa Tape" in Middletown,
NY gave me some "Toluene" as they use it as a latex thinner in the
manufacturing process. It worked like a charm, it dissolved the
damn latex immediately. I was hooked on the stuff. I highly
recommend it to everyone. It won't hurt anything on the machine, or
plastic, but I would keep it away from pucks as they are made of
rubber. Also it is a good idea to use it in a well ventilated
area</DIV>
<DIV> </DIV>
<DIV>The best way to clean the pimpled glasses in the vac <A
title=http://cols.is/ href="http://cols.is/">cols.is</A> to really
saturate a cloth with Toluene and wash it out, floating the stuff
away. Also the bottom edges of the entrance and exit guides of the
vac cols need to be done with a Q-Tip as small unseen bits of latex like
to live in there.</DIV>
<DIV> </DIV>
<DIV>My test to assure that the latex is completely gone is to thread the
machine up, put it in ready and manually turn the capstan both ways.The
whole thing, tape, and both reels should move freely, no sticking in
either direction and no "Squeaking".</DIV>
<DIV> </DIV>
<DIV>Now the same problem and Toluene cure applies to everything up to and
including the Digibetas. The U-Matics seem to have a problem with
tape coming around the guide <U>inside</U> of the cassette (Just
under the cover) causing the tape to either slow down or come to a
complete stop. A little Toluene on a Q-Tip at that guide will amaze
you. I also recommend cleaning the tape guides audio stacks, etc.
on the 1100's and 2000's and for that matter all machines,especially
before attempting to adjust the tape guides, you may save yourself a lot
of work.</DIV>
<DIV> </DIV>
<DIV>I understand Toluene may be hard to obtain, as it may be considered a
dangerous chemical. At first I ordered a gallon from Cole-Parmer in
Chicago. They sent it in a glass gallon jug in a cardboard box
- Not a good idea. If someone dropped it they would have had to
evacuate the whole building after it got into the air conditioning
system. After that I bought it in pint cans at a True Value hardware
store in Pa., right across the river from Port Jervis,NY. as it is a
common paint thinner. (Home Depot doesn't carry it in NY, NJ, or
Pa. nor does Lowes.) It only costs about $3.50 or so, not bad
for about $500.00 worth of "Ampex Head Cleaner." I have further
learned that Pa. is somewhat lax of the dangerous chemicals possibly due
to the "Hot-Rod" industry in that state.</DIV>
<DIV> </DIV>
<DIV>Don't forget what <U><STRONG>T</STRONG></U>ri -
<U><STRONG>N</STRONG></U>itro - <U><STRONG>T</STRONG></U>oluene will do
for you.</DIV>
<DIV> </DIV>
<DIV>One day there was a delegation from Sony in the shop, shortly after
the Digibetas arrived, we had a problem with heads and some of the guys
were replacing them like hot cakes. The toluene cured them, but they
still wanted to replace the heads, around 5 kb a pop.</DIV>
<DIV> </DIV>
<DIV>One of the Sony guys was the head of the Sony Tape Plant in
Ala. When I told him about using Toluene, he hit the roof
went into a rage about how terrible it was, I was nuts, and on and
on.</DIV>
<DIV> </DIV>
<DIV>I asked him what the Zip code of the tape plant is, and he gave it to
me. Now there is a Web site called "Score Card", in which you put in
a Zip code and it will tell you who the polluters in that area are, and
what they are polluting with. Well, it came up with the Sony Tape
Plant as being one of the top ten polluters in the country of
Toluene. ( <A
title=http://scorecard.org/env-releases/facility.tcl?tri_id=36301SNYMGHWY84
href="http://scorecard.org/env-releases/facility.tcl?tri_id=36301SNYMGHWY84"
target=_blank>http://scorecard.org/env-releases/facility.tcl?tri_id=36301SNYMGHWY84</A>).
I see now that they have changed to Cobalt as their major pollutant,
but (<A
title="http://oaspub.epa.gov/enviro/multisys2.get_list_tri?tri_fac_id=36301SNYMGHWY84) tells"
href="http://oaspub.epa.gov/enviro/multisys2.get_list_tri?tri_fac_id=36301SNYMGHWY84)%20tells"
target=_blank>http://oaspub.epa.gov/enviro/multisys2.get_list_tri?tri_fac_id=36301SNYMGHWY84)
tells</A> me they still spew quite a bit of Toluene into the air. If
you think he was mad earlier in the day, you should have seen him after I
showed him that. Score Card also showed my neighbor's plant
(Tessa Tape) in Middletown, NY also as being in the top 10% of Touluene
polluters also.( see <A
title=http://scorecard.org/env-releases/facility.tcl?tri_id=10940TSTCKCROTT#major_chemical_releases
href="http://scorecard.org/env-releases/facility.tcl?tri_id=10940TSTCKCROTT#major_chemical_releases"
target=_blank>http://scorecard.org/env-releases/facility.tcl?tri_id=10940TSTCKCROTT#major_chemical_releases</A>)
The Middletown Tessa Tape plant has since shut down and moved to Ala.
because of the pollution laws</DIV>
<DIV> </DIV>
<DIV>I recall times where there was some "Glue" stuck on the foam rubber
liners on some 1" tape reels. I wonder if this might also be leaking
latex binder from the tape, and not the glue holding the rubber to the
reels. It has also happened on some 2" reels with that type of
liner. Keeping in mind the amount of pressure on the wound
tape and the position of the "Glue" (Not on the outer edges of the
reel) this may be the case.</DIV>
<DIV> </DIV>
<DIV>To top it all off, I was in the "Lab" across the street from CBS in
the basement of the same building as Archives is located, bullshooting
with one of the "Old Timers" who has been a senior engineer with
the labs since before anyone ever heard of video tape. I mentioned
my exploits with Toluene and he was all over me telling me "That's How We
Did it Years Ago".</DIV>
<DIV> </DIV>
<DIV>Was wondering if anyone else has had similar experiences??</DIV>
<DIV> </DIV>
<DIV>73,</DIV>
<DIV> </DIV>
<DIV>George Keller</DIV>
<DIV
style="CLEAR: both"></DIV></FONT></DIV></FONT></DIV></DIV></FONT></BLOCKQUOTE></DIV><BR></DIV>=<BR><BR>_______________________________________________<BR>Please
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