silver soldering on metal clay metal clay world conference deborah e. love jemmott©2007
TRANSCRIPT
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Silver Soldering on Metal Clay
Metal Clay World ConferenceDeborah E. Love Jemmott ©2007
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Soldering on Metal Clay
• Burnish the Metal Clay Surface
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What is Burnishing?
Burnishing is the process of rubbing the metal with a
small hard tool to compact the surface. For porous
surfaces such as metal clay, it helps fill the microscopic
voids in the surface by making the small pieces of metal
fit more tightly together.
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Metal Clay Fired and Sintered
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What is Sintering?
Sintering is the bonding of adjacent surfaces of small
particles by heating the material at a high temperature,
but below that of the melting temperature of any
constituents in the material.
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Solder Penetrates a Non-Burnished Surface
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Solder on a Burnished Surface
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Why does this Matter?
• The voids suck the solder in like a sponge
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Why does this Matter?
• The voids suck the solder in like a sponge
• The solder can create a large discolored area and can
go completely through thin pieces
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Why does this Matter?
• The voids suck the solder in like a sponge
• The solder can create a large discolored area and can
go completely through thin pieces
• If too much solder is absorbed into the metal clay, there
will be insufficient solder to join the pieces of metal
being soldered
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How do I Burnish?
• Rub the fired metal clay in multiple directions while
pushing hard with an agate or metal burnisher
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How do I Burnish?
• Rub the metal clay in multiple directions while pushing
hard with an agate or metal burnisher
• Tumble the fired metal clay piece in rotary tumbler with
steel shot
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How do I know if it’s Burnished Enough?
The piece should be shiny with no white, frosty areas
where the solder will be flowed. The white, frosty
looking areas are where the sintered metal has not
been fully pushed together and will more easily allow
solder to flow into the voids.
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Soldering on Metal Clay
• Burnish the Metal Clay Surface• Maximize the Contact Area
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Soldering on Metal Clay
Insufficient Contact Good Contact
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Soldering on Metal Clay
Insufficient Contact Good Contact
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Why Does This Matter?
An ideal solder joint has a small fillet where the two pieces of metal connect.
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Why Does This Matter?
If the solder sucks into the metal clay voids
rather than primarily staying on the surface to
join with the other metal, the joint will be much
weaker.
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What Can I do About It?
BURNISH
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What Can I do About It?
BURNISH
BURNISH
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What Can I do About It?
BURNISH
BURNISH
BURNISH
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Soldering on Metal Clay
• Burnish the Metal Clay Surface• Maximize the Contact Area• Flow the Solder onto the Milled
Metal First
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Soldering on Metal Clay
Flow Solder on the Milled Metal First
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Why Does This Matter?
The milled metal will not absorb the solder the way the
metal clay will. The longer the metal clay is heated
during the solder process, the more opportunity there is
for solder to flow into the clay. Flowing the solder on the
milled metal first will allow for minimal heating of the
metal clay thus making the solder not as likely to
penetrate the surface of the metal clay.
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Soldering on Metal Clay
• Burnish the Metal Clay Surface• Maximize the Contact Area• Flow the Solder onto the Milled
Metal First• Be Generous with the Solder
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Why Does This Matter?
Even though the metal clay is burnished and the contact
area is maximized, there will be more solder absorbed
by the metal clay than is typical for milled metal. If a
generous amount of solder is provided, there will be
enough to form a solid solder joint even though some
will be lost to the metal clay structure.
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The following pieces all contain Art Clay® or PMC® used in combination with traditional fabrication techniques.
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Labradorite NeckpieceFine Silver / Sterling Silver / Labradorite / Tourmaline
Deborah E. Love Jemmott ©2003
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Tie It On Pendant
Copper / Fine Silver / Sterling Silver / Agate
Deborah E. Love Jemmott©2003
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Athena Earrings
Fine Silver / Sterling Silver / Chalcedony / Moonstone
Deborah E. Love Jemmott©2004
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Athena Neckpiece
Fine Silver / Sterling Silver / Chalcedony
Beads / Pearls / Glass
Deborah E. Love Jemmott©2004
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Copper & Jasper Brooch
Fine Silver / Sterling Silver / Copper /
Jasper / Iolite
Deborah E. Love Jemmott©2005
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Copper / Silver Pendant
Copper / Fine Silver / Sterling Silver / Amethyst
Deborah E. Love Jemmott©2005
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Dinosaur BroochCopper / Fine Silver / Sterling Silver / Petrified Dinosaur Bone / Onyx
Deborah E. Love Jemmott ©2005
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Crystal NeckpieceFine Silver /
Sterling Silver / Quartz Crystal /
Pearls / HematiteDeborah E. Love
Jemmott©2006