Originally Posted by
niftyshaving
NOT a dumb question.
The answer depends on your face, your whiskers,
your shave prep, the blade, the razor
holding the blade and your personal
preference.
If you have a safe place to keep it remove the
blade in question and shave with a new one.
Then put it back for a shave the next day.
Compare and contrast. Pay attention to
the top side when you put it back.
Some folk get more than a week some
a couple of days. I do not get five good shaves
from any brand. Some brands only two.
Some blades shave harshly on the first day and
then give a number of smooth shave to "dull". Some
shave smooth from day one to "dull". Some just
go downhill to dull and never are marvelous.
FWIW: This is one of the interesting and difficult topics for str8 razor shavers
that hone their own edges. With an open blade razor (straight/ str8)
the quality of the edge is in your hands and skill is an important
component. DE razors are much more consistent in a single
production lot which is why some folk buy +100 when they
find a good run.
Do not overlook the DE blades at the likes of Wallmart and Target.
Try a single package and if it is good empty the shelf the next day.
Do the math... shaves per blade , blades per package, price per......
To obtain the most shaves from a DE remember to rinse well
under hot water so it drys quickly. There are other tricks
but rinsing the razor clean is the important one.