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gluing magnets to 35mm film cannisters

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Marty Fouts

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Jul 24, 2002, 12:58:07 PM7/24/02
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Of the caches I've hidden, the most popular are sign-only microcaches
that are in 35mm film cannisters.

I have a variety of ways of placing the cannisters, and one I like --
that I first encountered in a GeorgeandMary cache -- involves gluing
magnets to the cannister and then putting the cannister along side
something metal. (Another variant is to use those hide-a-key tins)

My problem is that the magnets are not staying on. I've tried CA
glues (superglue) and do sand the surfaces first, but after a while
the flexibility of the can causes the magnet to pop loose.

Anybody have a clue as to how to keep the magnets stuck? Will hot glue
or epoxy work better?

Thanks,

Marty

Greg Smith

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Jul 24, 2002, 1:44:31 PM7/24/02
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In article <uwurlh...@yahoo.com>, usenet_p...@yahoo.com
wrote...

Is the magnet powerful enough to work if placed INSIDE the cannister?
If so, drop it in and squeeze some hot melt glue in on top of it. It'll
never fall out.
--
Greg
no...@mindspring.com

Herbert Kanner

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Jul 24, 2002, 5:24:42 PM7/24/02
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In article <MPG.17a8b18c1...@news.newsguy.com>,
Greg Smith <no...@mindspring.com> wrote:

The one magnetic microcache that I found looked as if the magnets had
been attached with epoxy.

Herb

--

In addressing email, replace deadspam.com by acm.org.
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Herbert Kanner <kan...@deadspam.com>

FizzyMagic

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Jul 25, 2002, 12:43:23 AM7/25/02
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On 24 Jul 2002 09:58:07 -0700, Marty Fouts
<usenet_p...@yahoo.com> wrote:

>Of the caches I've hidden, the most popular are sign-only microcaches
>that are in 35mm film cannisters.

35 mm film canisters are made of polyethylene; there is practically
nothing that sticks very well to polyethylene, as I have discovered in
trying to paint them. :-( It's better than Teflon, but not a whole
lot.

If I were you, I'd stick the magnet to the bottom of the inside of the
film canister with double-sided foam tape (the very sticky kind), and
hope for the best.

For microcaches that are magnetic, I've found that Altoids cans work
quite well. You need to run a little tape along one side of the
inside to make them waterproof, but gluing magnets to the bottom is
easy and they are easy to paint.

FM

patrick warnshuis

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Jul 25, 2002, 1:43:10 AM7/25/02
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The round magnets that are available from Radio Shack in a package of 4 are
not strong enough. I attach a stronger bar magnet to the outside of the film
canister using electrician's friction tape.
And everyone is right -- super glues are worth about one week of exposure
before the canister falls off the magnet.
....patrick

"FizzyMagic" <fizzy...@yahoo.com> wrote in message
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KBob

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Jul 25, 2002, 9:07:32 PM7/25/02
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Sorry if this attached photo is breaking the rules.

Home depot helped with this project. the glue is liquid nails (for small
projects) and the magnet is from the hardware department. I tried HD's
'Goop' and it failed this one works so far. HD also has some small cabinet
door magnets for mush less and I glued it on the side of the magnet. I'll
post a photo if I don't get shot at for this one.

KernBob

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N 41 26.295 W074 06.970
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"Marty Fouts" <usenet_p...@yahoo.com> wrote in message
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mrcpu

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Jul 25, 2002, 9:42:35 PM7/25/02
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Everyone is missing one obvious solution.... Oneway zipstrips. Those oneway
ties that you get at hardware stores, like the ones the police use for
temporary handcuffs.

I made a cache by putting one around the film cannister and zipping it up
tight with another one through the first.

In your case, one zipstrip goes around the canister and a second goes
through it and then through a magnet with a hole in it.

Cheers,

Rob

"Marty Fouts" <usenet_p...@yahoo.com> wrote in message
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Tjodleik

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Jul 26, 2002, 1:30:34 AM7/26/02
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> Of the caches I've hidden, the most popular are sign-only microcaches
> that are in 35mm film cannisters.
> Anybody have a clue as to how to keep the magnets stuck? Will hot glue
> or epoxy work better?

Use magnets from old Hardisks. they are realy stong.
Put one magnet inside the canister and one on the outside. These will
stop the glue from slipping.

Marty

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Jul 29, 2002, 9:23:30 PM7/29/02
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I use the double faced foam tape for securing lots of stuff on my
motorcycle which vibrates like crazy and nothing has ever fallen off. I
use the black 3M tape about 3/4" wide and 1/16" thick..

Bill Jackson

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Jul 30, 2002, 10:34:04 PM7/30/02
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Silicone crack seal or bathtub caulk will glue a magnet to polyethylene.
Clear, white, or brown is fine.Do not use the 'siliconised' stuff, that is
just putty trying to trade on the silicone 50 year lifetime. It will say
silicone. Dow corning is commonest maker, GE is another makes.
All Home depots have tons of it for $~3 for a 2 pound tube, which will glue
1000 magnets to 1000 film cans. You can also get 4 ounce toothpaste tubes
for a little less.
It usually smells like acetic acid(vinegar) as it cures.
For extra grab rub the can on the cement or brick or sandpaper on the area
you will stick to.


Bernie M.

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Aug 3, 2002, 12:26:38 AM8/3/02
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I Personally think a 1/2 inch bolt thru the magnet welded so the bolt wont
come loose, duct taped to whatever/where-ever you want AND the magnet would
stick to the bolt!!!
OK, just being a wise a$$, otherwise,
I have NO idea,,,
Bernie&Sheri

"Tjodleik" <tjod...@hotmail.com> wrote in message
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Benson Wills

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Jan 17, 2003, 11:39:59 AM1/17/03
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Old thread, I know...

I'd try this: Drill or melt a couple of small holes through the lid. Use
Goop marine adhesive or another good all-weather flexible adhesive. Put
a good spread of Goop on top of the lid, pressing the Goop down through
the holes. Spread the Goop out a little bit on the underside of the lid.
In effect you're locking the adhesive to the lid. You can use the same
technique if your magnet has a hole in it - Just do it all before the
adhesive dries.

--
E-mail replies: change 'blackhole' to 'usenet3'

MattieDale

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Jan 17, 2003, 4:26:42 PM1/17/03
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I have tow letters and a number for and answer. PC7. It is the best epoxy
type adhesive. It will practically stick to water. You should be able to
get it at your local hardware store. It comes in two 35mm film cans and you
mix it equally. taks 24 hrs to harden. Nothing stuck to the inside of
our fire truck but PC7 did. We even reparied a plastic gas tank with it.


"Benson Wills" <blac...@doozy.us> wrote in message
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someone

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Jan 17, 2003, 4:51:27 PM1/17/03
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or instead of trying to get the magnet to stay on the lid which flexes a lot
going on and off, stick the magnet to the bottom of the film can, which
doesn't flex as much.

"Benson Wills" <blac...@doozy.us> wrote in message
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Archie D Henderson

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Jan 17, 2003, 6:20:47 PM1/17/03
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I like the name you use, "someone". Very good!

Archie
Way down south......


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