cavemen sharpened pieces of flint and use them to shave their facial hair
modern man can simply go purchase a pack of razor blades for his shaver while
several styles of shavers & blades exist many men believe the traditional type of
razor blade gives the closest shave of them all their paper thin
he had sharp enough and strong enough to cut through the courses beard razor
blades are made from a stainless steel strip
that's a mere one tenth of a millimeter thick the strip first enters a punching
machine which stamps out the overall blade shape
these double edged blades to be are called blanks at this stage of
production the stainless steel is very soft as pliable as paper so they now
hardened and strengthen it through a four-step heat treatment process step 1
they heat the blanks in a furnace - 1,100 degrees Celsius for about 30
seconds step 2
they briefly submerge them in cold water this is called quenching step 3
they chill them for about 20 seconds and a deep cooling chamber at a temperature
of minus 50 Celsius all this progressively restructures the molecules
hardening the metal
however the metal becomes brittle necessitating reheating the blanks for
20 seconds to restore flexibility the now hard blanks then move through a
printer which applies the razor blade brand name gas flames instantly dry the
wet ink
now it's time for the blanks to become blades they enter a grinding and
polishing machine within it are three grinding stations which first sharpen
the contour then produce two super sharp cutting edges
the blades then pass through a polishing station which removes burst left by the
grinding until now the blades have been connected to each other as they exit
this machine a knife separates them
the factories quality-control lab pool samples from the production line and
checks among other criteria the quality of the grinding and geometrics of the
cutting edges then every single blade the factory produces is examined for
cutting-edge defects technicians assemble blades in packs of up to 800
then shine fluorescent light on the to cutting-edge sides
this makes defects visible blades which pass this inspection are washed with
solvent to remove contaminants then dried the now Christine razor blades go
into a vacuum chamber
it draws a chromium based coding onto the surface rendering the cutting edges
harder and more wear-resistant next spray nozzles apply a nonstick coating
which will help the blades glide smoothly over the skin to adhere the
coding permanently to the blade surface they bake it on for 20 minutes at about
350 degrees Celsius
quality control technicians test samples again this time to ensure the blades
meet strength specifications this test machine measures the force required for
the blade to cut a thick wad of wet paper to a certain depth back in
production workers submerge the razor blades in organic oil for about half an
hour
this provides additional protection against corrosion on the packaging line
the equipment wraps each blade individually in wax paper
the wax coating on the paper helps protect the razor blade against
corrosion during storage wax paper is also stronger than regular paper
so the blades razor-sharp edges don't cut through it
the edges of these razor blades are about 10 times thinner than a human hair
a blade typically last about six shaves
so the average male goes through quite a few considering that over the course of
his life time he'll have spent more than 3,300 hours
shaving his face
For more infomation >> GAME MY GOURAMI VOLUME #6. TALKING TOM AND ANGELA FRIENDS games cartoons educational videos. - Duration: 10:40. 
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