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Letter 40084
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++++++ As a hobbyist I am building/making miniature objects
(houses, castles, sculptures, etc.) out of glass, wood,
rocks, plastic and plexiglass. Now I am working on a new
project. I am trying to glue Canadian pennies together for a
while(In order to build a sculpture), but every product I
have tried unfortunately has failed. Currently I am a
student. Josip (Joe)
++++++ Clean the pennies well before adhering them, try Silaprene adhesive. Tavinder Channa
++++++ Dip the pennies in vinegar for a few minutes to clean them, let them dry and then glue them together with epoxy resin (eg Araldite).
++++++ Avoid epoxy adhesive if you want a reliable bond. Copper reacts with epoxy (or more correctly the hardener). Brass and copper can be epoxy bonded but need to be tin plated first.
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Joe
Sorry I was interrupted before I had completed my answer.
The best "glue" for copper is solder. You need 60/40 Tin Lead solder
sold for electronic work with a non corrosive flux core. It is common
and cheap. It comes as a wire and you may need to flatten it slightly
by rolling or gentle hammering - it is quite soft. Get your cents
direct from the bank and handle them by the edges and you will
probably not have to clean them. Cut (small) pieces of the solder
wire and assemble the stack. Place in an oven at about 190 - 200 C
(the solder melts at about 185C) To seperate the stack or to make
other shapes, a small hobby blowlamp works fine.
PS. Don't get paranoid about the lead in the solder. It produces no
measurable fumes below 400C Any fume is from the flux - don't go
sniffing it!
One other fact you may be able to use - most modern copper coins are
only copper over a steel core - they can be magnetised - be
creative!!!
Good luck
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Geoff Smith |
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