Fluoropolymer coatings do NOT adhere to steel ,especially to stainless steel alloys .
Actually they do not adhere (permanently at least ) to any surface of any material.
Modern fluoropolymer razor blade coatings are not used to provide less friction while cutting through a hair ,as
is widely believed.
Blade edges are coated with
fluoropolymer ( always being the final coat ) to protect
the edges from oxidizing ,from the time the blades exit their production facility until they reach the consumer.
Fluoropolymers do not adhere to stainless steel .
The fluoropolymer coating was chosen as the best
and cheapest way to protect the blades' edges.Although nowadays we are aware that
it belongs to what it is called "forever chemicals " or PFAS :
https://en.m.wikipedia.org/wiki/Per-_and...substances
Nasty stuff,but still used widely...
This very fluoropolymer coating is being removed from
the first pass of the first use of the blade (
some being absorbed by the skin ,most being flushed to oceans ) ,that is why the first shave
of most blades is not exactly their best one.
The fluoropolymer coating widens the keen edge of a blade and until it is removed ,most -if not all- blades feel somewhat draggy and/or somewhat harsh.
After the first shave ,when 99.9% of the fluoropolymer coating has been abraded and washed away,the blades start to show their true "character" .
Corking a blade removes most of this fluoropolymer coating ( meaning that less is absorbed by the skin /flushed into oceans ),thus beyond increasing the comfort of shave ,actually is rather a healthy habit ,as also environmentally friendly.
To disintegrate any possible remains of
the idea that fluoropolymer razor blade coating is used
for increased shaving comfort ,just think of straight razors .They lack that kind of coating whatsoever.But still considered to deliver far
smoother shaves than DE blades.
PS :
SLICING ( lightly ) through a cork does not pose any risk of dulling a razor blade's
edge.What actually dulls a blade is CUTTING through stubble,as this tends to cause tiny cracks and micro-chipping of the blade's edge.
Especially when the hair is allowed to move and the blade's edge does not meet
the hair strands at a perpendicular angle.
Excuse me for the multiple edits,
but english is not my mother language
and I do not quite "own" it .