Hello there gents,



Thanks for looking into my post. I recently came across a video in which two interesting but opposite theories on blade dulling were presented. Following are the theories.



Theory 1: The sharper the blade, the longer it will last because with each shave it will slightly lose its edge and sharpness as a result. So yes according to this theory, the sharpest blade (feather) will last longer than any other blade.



Theory 2: The sharper the blade, the least it will last as compared to other blades with duller edge. The logic behind this theory is that sharper blades have a thinner edge and dull blades have a thicker one. Its a similar comparison between two pencils. One with sharper tip and one with slightly dull tip. The sharper pencil will easily lose its tip with couple of uses because it is thin and weaker in terms of handling the friction and opposing forces.On the other hand, the dull one will keep giving slightly poor but consistent performance for a longer period of time because it is thicker and has more capacity to deal with friction.



Here I get only two brands of DE blades i.e. Treet platinum and 7 o clock. Also, I throw away my blades after a single use so I can't really experiment with these theories due to brand limitation.But I would really like your input on this matter who have experienced shaves with many brands of DE blades and tried multiple shaves on a single blade. What was your experience in terms of presented theories?



Thanks