meanwhile back at the story of Steel now
if you’re serious about cooking then a
really sharp knife is a must and if you
look after it then it can last you years
but what about a blade that last 4,000
years there’s a sharp two days it wasn’t
it was first made for that you need to
go to Japan the Holy Grail in sword made
King is having a steel which is hard
enough to hold an edge but flexible
enough to survive heavy combat the
Japanese got round this problem by
folding the steel up to 15 times which
knocked out all the impurities they also
often used different grades of steel for
different parts the blade typically
using a hard steel for the cutting edge
and a softer more flexible steel for the
spine and finally they’d control the
tempering of the blade by covering the
hot sword in layers of clay the less
clay the faster it cooled and the harder
the edge now we’ve seen in countless
martial arts movies how samurai swords
hack through limbs as if they’re made of
butter but are they really that sharp
we’re gonna find out yeah to assist
Jonny with this task we’ve recruited the
help of historic weapons enthusiast
Andy Dean right so what do we got here
Andy well this is a matte soap dishing
feels quite damp too yeah so it’s very
solid
basically if you didn’t have any
peasants or prisoners to practice on no
this was second best
either that or green bamboo the eye here
being obviously you can see the the
thickness of it well sense a little the
weight of it replicating someone’s arm
yeah NIC arm really yeah I mean but
you’ll see that it’s not much of a
problem either way so it’s gonna go
through that because that really does
feel quite dense with my lack of ability
I’m sure the sword will compensate for
me must be able to do this
now if you miss that here it is again
samurai swords Wow
well Andy that was really impressive
laying on clean through that really is a
clean cut well you can see the design
the curve of the sword and the steel
that’s in it makes it a fantastic
clinical weapon
if you’re serious about cooking then a
really sharp knife is a must and if you
look after it then it can last you years
but what about a blade that last 4,000
years there’s a sharp two days it wasn’t
it was first made for that you need to
go to Japan the Holy Grail in sword made
King is having a steel which is hard
enough to hold an edge but flexible
enough to survive heavy combat the
Japanese got round this problem by
folding the steel up to 15 times which
knocked out all the impurities they also
often used different grades of steel for
different parts the blade typically
using a hard steel for the cutting edge
and a softer more flexible steel for the
spine and finally they’d control the
tempering of the blade by covering the
hot sword in layers of clay the less
clay the faster it cooled and the harder
the edge now we’ve seen in countless
martial arts movies how samurai swords
hack through limbs as if they’re made of
butter but are they really that sharp
we’re gonna find out yeah to assist
Jonny with this task we’ve recruited the
help of historic weapons enthusiast
Andy Dean right so what do we got here
Andy well this is a matte soap dishing
feels quite damp too yeah so it’s very
solid
basically if you didn’t have any
peasants or prisoners to practice on no
this was second best
either that or green bamboo the eye here
being obviously you can see the the
thickness of it well sense a little the
weight of it replicating someone’s arm
yeah NIC arm really yeah I mean but
you’ll see that it’s not much of a
problem either way so it’s gonna go
through that because that really does
feel quite dense with my lack of ability
I’m sure the sword will compensate for
me must be able to do this
now if you miss that here it is again
samurai swords Wow
well Andy that was really impressive
laying on clean through that really is a
clean cut well you can see the design
the curve of the sword and the steel
that’s in it makes it a fantastic
clinical weapon
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