I get anywhere from seven to ten ( or a bit more ) shaves from each DE blade I use .
Mainly I use Gillette Nacets ,Gillette 7 o'clock
Super Platinum ( the made in India "Black Ninja " ones ) and Wilkinson Sword .
Other blades that I have in stock and like to use include the following:
Gillette Perma Sharp ,Gillette 7 o'clock SharpEdge,Gillette Rubie+ ,Polsilver Super Iridium,Wizamet,Bic Chrome Platinum,Concord and Astra SS .
My mediterranean genes "gifted"me with steel-wire-like stubble and the tap water here is very hard ( usually around or above 35 °f ) .
How do I manage getting this amount of shaves from each blade,no matter the brand ?
Firstly ,I never leave them on the razor.
After each shave I rinse the blade with tap
water and place it on a dry towel and just
by folding part of the towel ,I gently "tap" dry the blade ,especially it's edges.Then carefully
place the blade inside their paper envelope.
Is this the "secret" to prolonging the service life of a blade ?
Nope.But it helps to avoid corrosion ,
which can readily impact it's
sharpness.
What I 've discovered is that when I started stretching my skin with my free hand , in the opposite direction of the grain ,thus "erecting" the hair from the skin surface ,the razor's efficiency was increased ,but also this method
seemed to make the razor blades last longer.
At first ,I thought that this was just my imagination .Then I did few tests .
And indeed ,the method of stretching the skin
in opposite direction than of grain does in fact
prolongs the blade's service life.
For quite some time I was wondering
"WHY ? " and was trying to give a logical
explanation to that phenomenon but to no avail .
Till I read the following MIT research :
https://news.mit.edu/2020/why-shaving-du...20chipping.
....where it is stated :
(...) When he analyzed the SEM images and movies taken during the cutting experiments, he
found that chips did not occur when the hair was cut perpendicular to the blade. When the hair was free to bend, however, chips were more likely to occur. These chips most commonly formed in places where the blade edge met the sides of the hair strands.(...)
Lifting/erecting the hair strands by stretching the skin OPPOSITE TO THE GRAIN ,does help
for the razor blade to cut the former at a steeper or even at the ideal perpendicular angle.
Thus minimizing the micro-chipping of the blade's edge .Thus keeping the blade sharper for longer !
And that was really a relief for me to read ,because I was really starting to think that
something is not quite right ,regarding my
mental health .
Surely ,steel alloy and origin of manufacture do play a role also.But do not expect to find those huge differences there.Or to put it in another way the former have a lesser impact
to the longevity of a razor blade.At least
regarding the well established brands .
More info about razor blade steel and origin
of manufacture here :
https://globalshave.club/blog/f/everythi...+Education
And :
https://www.enservejpn.com/a-secret-fact...ply-chain/
Just my 2 cents .