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New Findings
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In 2020 I had access to a somewhat
unusual Luristan iron mask sword (called type 1 here). That's what it looks
like: |
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Unusual Luristan type 1 sword |
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Heavily corroded and not very
remarkable on a first glance. On a second glance, however, you note that the
blade is triangular, not a common feature of Luristan type 1 swords.
After some cleaning and looking more closely, you realize that two serious
damages to the edge of the blade have been repaired by soldering (with pure
tin?) a small piece of bronze into the gap. Here are pictures. |
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Luristan type 1 sword with repairs of the
blade |
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The silvery metal around the bronze
pieces (identified by its typical color) is very soft (easily pierced with a
needle) and thus must be tin. |
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It's a fake, of course. That's what every serious
archaeologist would conclude. I'm not so sure, however. Here are my reasons:
- The sword itself is definitely genuine and not a fake. The only fake then
can be the repair, possibly done by a modern craftsman trying to make the old
sword look better.
- When I received the sword, it was covered with grime and rust;: see the
topmost picture. The repairs were not visible and neither were the two big
holes in the blade, see below and the small holes next to one bronze insert
(whit arrows). All holes and the bronze inlays only became obvious after
cleaning.
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Luristan type 1 sword with repairs of the
blade (bottom left)
and two big holes |
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- While it is possible that the forger artificially corroded and dirtied the
sword after making the repair, it makes no sense whatsoever. Why didn't he fill
up the holes too? And why making the appearance much worse by corrosion if his
goal was to make the sword look better?
- Now to the killer argument: If the two holes behind the bronze inlay were
there originally, the then incomplete repair makes no sense at all. If they
were produced by artificial corrosion after the repair, the whole process makes
no sense at all once more.
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So let's assume that the repair was
done when the sword was in use. The holes visible now are due to corrosion
taking place for almost 3000 years.
The questions now is: Would the old Luri smiths have been capable of doing a
repair like this? My answer is: yes! They certainly had noticed that tin has a
low melting point and that you could melt it just by touching it with a medium
hot copper rod. Moreover, the molten tin will wet the copper and coat the
surface - provided the copper (or bronze) was clean. The hard part is to get
liquid tin to wet iron. That needs a flux of some kind. While not any fatty
substance (like bees wax) will work, some might. We just don't know those
secrets anymore because we buy some working flux somewhere without having the
faintest idea of what it contains.
Wikipedia claims that olive oil and Ammonium chloride would work for soldering
iron. Ammonium chloride, if you wonder, can be made from urine. If the old
Luristanis had ammonium chloride is doubtful but they may have had similar
substances and who knows what else might work. |
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Why did the use a piece of bronze
and not a piece of iron to fill the holes? Who knows, My guess is that it is
just much easier to work with. It it was completely covered with tin, it looks
like like iron and you hardly could see the repaired part of the blade.
My conclusion is |
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The Luristan smiths could do
complex repairs
The sword shown here is the only
known example
of this antique technique
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There are probably more examples of
repaired blades or other parts of formerly expensive swords. It's just that
nobody noticed so far. First, it might be hard to see below the corrosion
layers, and second, if the repair was good, it is hardly visible. |
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© H. Föll (Iron, Steel and Swords script)