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Posted by Martin H. Eastburn on April 20, 2008, 11:22 pm
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The gold plated screws said it all.
What are they - 23 ctw ? color matching might be a nightmare.
I'd talk to the man and see if selling the gold (as is) to a dental lab
and with that money buy the quality gold. If you need to cast and can't -
there are jewelry makers that can.
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
Frank J Warner wrote:
>
>> To make a long story short, a customer wants a very special knife,
>> which is mostly built. But he wants embellishments on the knife that
>> I've never attempted before, so I'm seeking advice from the good and
>> knowledgeable people in this group.
>>
>> He wants a solid gold thumb stud, and he sent me the gold. It is, for
>> the unsqueamish, a dental bridge and a couple of gold crowns,
>> apparently harvested from his own mouth a few years ago when he plowed
>> into a bridge abutment and ate the steering wheel. The doctors had to
>> reconstruct his face, but they saved his gold teeth, which he sent to
>> me for this project.
>>
>> Yeah. He sent me his teeth. You can stop gaping now. Metal content
>> ensues:
>>
>> I've looked online and found that dental gold can contain lots of other
>> metals, including platinum, palladium, silver and even chromium, copper
>> and zinc. No way to tell what's in this guy's teeth. The fittings don't
>> look like gold. They look like untarnished copper. They don't have the
>> look of a 24 karat grille, but they are 40 years old.
>>
>> I've melted and cast small gold parts before, but only from gold that
>> was 100% identifiable in terms of alloy. This is a different situation.
>> I have no way to know what's in this amalgam. I'm afraid to put a torch
>> to it.
>>
>> My tooling includes a heat-treating oven that can reach 2200° F, a
>> propane torch and an AO rig. I have crucibles for precious metal
>> melting.
>>
>> How can I make this guy's thumb stud?
>>
>> -Frank
>
> Replying to my own post, I melted one of the small crowns not attached
> to the main bridge piece with a propane torch this afternoon. It melted
> just like one of those old dimes I used to melt with my daddy's propane
> torch back in the 60s; the real silver lady liberty dimes.
>
> The resulting lump was more silver than gold in color, so I suspect
> this amalgam is heavy with silver.
>
> The bottom line is that it melted in a familiar way, so I'm probably
> able to melt and cast the remainder into a piece I can machine for a
> thumb stud.
>
> The color will be slightly off. This knife uses pre-ban elephant ivory
> for the scales, and I'm using gold-plated screws to hold it all
> together. The thumb stud will be halfway between the color of the blade
> and the color of the screws.
>
> -Frank
>
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Posted by pyotr filipivich on April 21, 2008, 6:45 am
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I missed the Staff meeting, but the Memos showed that Frank J Warner
-0700 in rec.crafts.metalworking :
>
>The color will be slightly off. This knife uses pre-ban elephant ivory
>for the scales, and I'm using gold-plated screws to hold it all
>together. The thumb stud will be halfway between the color of the blade
>and the color of the screws.
Cool. At least it sounds cool looking.
You may want to explain how it is that the "gold" bridgework
melted down into a less 'gold' color.
tschus
pyotr
--
pyotr filipivich
"I had just been through hell and must have looked like death warmed
over walking into the saloon, because when I asked the bartender
whether they served zombies he said, ‘Sure, what'll you have?'"
from I Hear America Swinging by Peter DeVries
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Posted by Tim Wescott on April 21, 2008, 12:04 pm
Please log in for more thread options On Sun, 20 Apr 2008 16:44:27 -0700, Frank J Warner wrote:
>
>> To make a long story short, a customer wants a very special knife,
>> which is mostly built. But he wants embellishments on the knife that
>> I've never attempted before, so I'm seeking advice from the good and
>> knowledgeable people in this group.
>>
>> He wants a solid gold thumb stud, and he sent me the gold. It is, for
>> the unsqueamish, a dental bridge and a couple of gold crowns,
>> apparently harvested from his own mouth a few years ago when he plowed
>> into a bridge abutment and ate the steering wheel. The doctors had to
>> reconstruct his face, but they saved his gold teeth, which he sent to
>> me for this project.
>>
>> Yeah. He sent me his teeth. You can stop gaping now. Metal content
>> ensues:
>>
>> I've looked online and found that dental gold can contain lots of other
>> metals, including platinum, palladium, silver and even chromium, copper
>> and zinc. No way to tell what's in this guy's teeth. The fittings don't
>> look like gold. They look like untarnished copper. They don't have the
>> look of a 24 karat grille, but they are 40 years old.
>>
>> I've melted and cast small gold parts before, but only from gold that
>> was 100% identifiable in terms of alloy. This is a different situation.
>> I have no way to know what's in this amalgam. I'm afraid to put a torch
>> to it.
>>
>> My tooling includes a heat-treating oven that can reach 2200° F, a
>> propane torch and an AO rig. I have crucibles for precious metal
>> melting.
>>
>> How can I make this guy's thumb stud?
>>
>> -Frank
>
> Replying to my own post, I melted one of the small crowns not attached
> to the main bridge piece with a propane torch this afternoon. It melted
> just like one of those old dimes I used to melt with my daddy's propane
> torch back in the 60s; the real silver lady liberty dimes.
>
> The resulting lump was more silver than gold in color, so I suspect this
> amalgam is heavy with silver.
>
> The bottom line is that it melted in a familiar way, so I'm probably
> able to melt and cast the remainder into a piece I can machine for a
> thumb stud.
>
> The color will be slightly off. This knife uses pre-ban elephant ivory
> for the scales, and I'm using gold-plated screws to hold it all
> together. The thumb stud will be halfway between the color of the blade
> and the color of the screws.
>
> -Frank
Show it to the customer. I if he doesn't want to come out and look tell
him that it doesn't match and you won't be responsible for the aesthetics
of the thumb stud - or get it in writing. Surprises to the customer can
be painful all around, and they often change their minds over aesthetic
issues like this. Seeing _is_ believing, but not all folks (even, or
perhaps especially, those with money) are wise enough to know this.
--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com
Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
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Posted by kfvorwerk@gmail.com on April 21, 2008, 7:28 am
Please log in for more thread options wrote:
> To make a long story short, a customer wants a very special knife,
> which is mostly built. But he wants embellishments on the knife that
> I've never attempted before, so I'm seeking advice from the good and
> knowledgeable people in this group.
>
> He wants a solid gold thumb stud, and he sent me the gold. It is, for
> the unsqueamish, a dental bridge and a couple of gold crowns,
> apparently harvested from his own mouth a few years ago when he plowed
> into a bridge abutment and ate the steering wheel. The doctors had to
> reconstruct his face, but they saved his gold teeth, which he sent to
> me for this project.
>
> Yeah. He sent me his teeth. You can stop gaping now. Metal content
> ensues:
>
> I've looked online and found that dental gold can contain lots of other
> metals, including platinum, palladium, silver and even chromium, copper
> and zinc. No way to tell what's in this guy's teeth. The fittings don't
> look like gold. They look like untarnished copper. They don't have the
> look of a 24 karat grille, but they are 40 years old.
>
> I've melted and cast small gold parts before, but only from gold that
> was 100% identifiable in terms of alloy. This is a different situation.
> I have no way to know what's in this amalgam. I'm afraid to put a torch
> to it.
>
> My tooling includes a heat-treating oven that can reach 2200=B0 F, a
> propane torch and an AO rig. I have crucibles for precious metal
> melting.
>
> How can I make this guy's thumb stud?
>
> -Frank
>
> --
> Here's some of my work:http://www.franksknives.com
It's been cast once so you can probably cast it again. I seem to
remember there's a way to remove nongold metals from the surface (an
acid etch or something) You'd have to look for it.
Karl
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Posted by Mark F on April 21, 2008, 8:43 am
Please log in for more thread options kfvorwerk@gmail.com wrote:
> wrote:
>> To make a long story short, a customer wants a very special knife,
>> which is mostly built. But he wants embellishments on the knife that
>> I've never attempted before, so I'm seeking advice from the good and
>> knowledgeable people in this group.
>>
>> He wants a solid gold thumb stud, and he sent me the gold. It is, for
>> the unsqueamish, a dental bridge and a couple of gold crowns,
>> apparently harvested from his own mouth a few years ago when he plowed
>> into a bridge abutment and ate the steering wheel. The doctors had to
>> reconstruct his face, but they saved his gold teeth, which he sent to
>> me for this project.
>>
>> Yeah. He sent me his teeth. You can stop gaping now. Metal content
>> ensues:
>>
>> I've looked online and found that dental gold can contain lots of other
>> metals, including platinum, palladium, silver and even chromium, copper
>> and zinc. No way to tell what's in this guy's teeth. The fittings don't
>> look like gold. They look like untarnished copper. They don't have the
>> look of a 24 karat grille, but they are 40 years old.
>>
>> I've melted and cast small gold parts before, but only from gold that
>> was 100% identifiable in terms of alloy. This is a different situation.
>> I have no way to know what's in this amalgam. I'm afraid to put a torch
>> to it.
>>
>> My tooling includes a heat-treating oven that can reach 2200° F, a
>> propane torch and an AO rig. I have crucibles for precious metal
>> melting.
>>
>> How can I make this guy's thumb stud?
>>
>> -Frank
>>
>> --
>> Here's some of my work:http://www.franksknives.com
>
> It's been cast once so you can probably cast it again. I seem to
> remember there's a way to remove nongold metals from the surface (an
> acid etch or something) You'd have to look for it.
> Karl
Labs around here aren't re-using take-outs. Too many inclusions
of things that create minor spattering and surprises.
Was there any Mercury alloying <grin> of dental Gold? /mark
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