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Why did the professional camera reviewers totally miss a serious flaw in the camera?

N

Nate Nagel

Jan 1, 1970
0
duct tape was originally developed during World War II in 1942 as a
waterproof sealing tape for ammunition cases

then why does it fail so rapidly when exposed to water or high humidity?

just curious,

nate
 
S

Steve Barker

Jan 1, 1970
0
and........ proceeding to the next paragraph........



:quoting from the same place you did:


The name "duct tape" came from its use on heating and air conditioning
ducts,


end quote.....


steve
 
then why does it fail so rapidly when exposed to water or high humidity?

just curious,

nate


It is simply because the crap they sell at Wal-Mart is not GI grade
(AKA 100 MPH duct tape). I had some I used on dive gear that held up
for many years and regularly used under water.
You can still buy it at some military type stores but it costs over
$10 a roll.
 
:quoting from the same place you did:


The name "duct tape" came from its use on heating and air conditioning
ducts,


It just is not approved by the testing labs that set HVAC standards
and will not meet code anywhere.
 
J

John McWilliams

Jan 1, 1970
0
Steve said:
and........ proceeding to the next paragraph........



:quoting from the same place you did:


The name "duct tape" came from its use on heating and air conditioning
ducts,


end quote.....

That's all pretty brilliant, but all of that has been covered in the
thread. Does no one read prior to posting anymore?
 
D

dj_nme

Jan 1, 1970
0
Dave said:
dj_nme said:
Flashing used to be done with lead foil sealed/glued with pitch, now it
is done with adhesive metal [usually aluminium] tape, hence "flashing
tape".


I wonder on what sort of construction?

The edges of flat roofs, the edges of walls between abutting buildings
(to prevent ingress of moisture between them) and around openings in
roofs (such as hatches, chimneys and skylights).
 
M

Michael A. Terrell

Jan 1, 1970
0
John said:
Where in world did you come up with duck?? One doesn't tape ducks; one
tapes ducts. except it isn't very good for that.....


SIGH. It was named DUCK tape by GIs who used it to waterproof
shipping containers, because 'Water flows off it, like water off a
duck's back'.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
J

John McWilliams

Jan 1, 1970
0
Michael said:
SIGH. It was named DUCK tape by GIs who used it to waterproof
shipping containers, because 'Water flows off it, like water off a
duck's back'

Ex-urban legend. Plus this was already covered, ad naseum.
 
R

Ron Hunter

Jan 1, 1970
0
Steve said:
Wrong. Again.

The original DUCT tape had and still has NO metal foil.

http://tinyurl.com/ywrzu5
The original product was called 'Duct tape', and while it was great for
many uses, with a metalized cloth backing, and a rather thick adhesive,
it was tested on actual ductwork, and found severely lacking for this
use because the adhesive becomes hard when exposed to heat, and the tape
turns loose. However, it has MANY other great uses, and the astronauts
on Apollo 13 wouldn't have survived had they not had it along.
It can be a valuable asset around the house, as long as you don't try to
use it on heating ducts.

The product known as 'Duck tape' is simply a cheap knock-off of the
original product, and is, in my experience, vastly inferior.
 
R

Ron Hunter

Jan 1, 1970
0
G said:
Steve said:
Duck tape and duct tape are TWO DIFFERENT THINGS!!!!

Duck tape is made from cloth and is a REALLY bad choice for using on
ducts. It was designed originally to repair tarps and withstand the
weather.

Duct tape is made from metal foil and is designed for use on metal
ductwork.
Wrong. Again.

The original DUCT tape had and still has NO metal foil.

http://tinyurl.com/ywrzu5
Metal tape with adhesive is known as "flashing tape", used to seal the
edges of roofs to prevent the ingress of moisture under the edge of
roofing material or between walls that are built hard up against each other.
Flashing used to be done with lead foil sealed/glued with pitch, now it
is done with adhesive metal [usually aluminium] tape, hence "flashing tape".
In Australia, generic "duct tape" is essentially like a very wide
electrical tape: a stretchy PVC backing with glue on it, usually about 2
inches wide.
This tape that's cloth backed in plastic with an easy release adhesive
sounds more like "gaffer tape", which is used extensively in the
entertainment industry to hold electrical cables in place and for
slapdash on-the-spot repairs.
A "gaffer" is an on-set electrician used during the making of a movie or
in-house electrician for a theatre, hence "gaffer tape".

I never came across using aluminum foil tape as flashing. I have used
it for ducts, for hot exaust pipes, and other uses. Flexible sticky flashing
is now usually done with mineral based sheeting with polyethelene
backing. Most auto parts stores sell metal tape. I used some stainless
tape for covering chrome or chrome like parts. I just recently came across
the cloth tape with mild stick, or gaffers tape. New to me. There are
different backings for duck tape. I like using the remants of the not
available anymore, 100 MPH tape from Sprotsman Guide, orginally used
to repair aircraft wings. It has a stretch unlike most, and really
holds up and sticks well.


greg

An aluminum metal tape is also used to seal the seams between the
metal-backed foam insulation on homes. The adhesive is permanent, and
the tape is pretty expensive as such things go, but it keeps out the
wind (and water) well.
 
R

Ron Hunter

Jan 1, 1970
0
Steve said:
It IS duct tape however. What do you think it was originally designed for?

s
Ironically, NOT for ducts. I suspect some fly-by-night heating and air
conditioning people used it, and it took that name, but it has been
shown to be a very ineffective tape for that application.
 
R

Ron Hunter

Jan 1, 1970
0
Nate said:
then why does it fail so rapidly when exposed to water or high humidity?

just curious,

nate
Original duct tape didn't have the same adhesive as the current product,
and its many imitators.
 
W

William Sommerwerck

Jan 1, 1970
0
SIGH. It was named DUCK tape by GIs who used it to waterproof
shipping containers, because 'Water flows off it, like water off a
duck's back'.

Also possibly because it was made of cotton duck cloth.
 
G

G

Jan 1, 1970
0
then why does it fail so rapidly when exposed to water or high humidity?

just curious,

nate

The biggest failure is drying out.

greg
 
C

Chris Lewis

Jan 1, 1970
0
According to said:
It is simply because the crap they sell at Wal-Mart is not GI grade
(AKA 100 MPH duct tape). I had some I used on dive gear that held up
for many years and regularly used under water.
You can still buy it at some military type stores but it costs over
$10 a roll.

While perhaps not _quite_ Mil-Spec, you can get a very close equivalent
at other places. Lee Valley carries it for example.
 
G

George

Jan 1, 1970
0
Nate said:
then why does it fail so rapidly when exposed to water or high humidity?

just curious,

nate
Because just like a lot of stuff there is a quality version and a cheepo
version designed to be sold in big box stores.

If you go to a real supply house you can buy quality duct tape.
 
S

Steve Barker

Jan 1, 1970
0
I'm not sure who you were asking, but the tape does not and can not be what
holds the ducts together. It is merely for sealing the joint for anal
types. Most ducts don't have tape on them.

s
 
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