Originally Posted by
Quick
Not sure I buy that Bart. I think the main contribution of speed in this context would be zero (static friction) or non-zero (kinetic friction). After that there may be some difference due to plastic deformation of the strop surface. If we imagine the strop surface to be pliable and bumpy then at a faster speed (same downforce) the razor may "skim" across the tops of the bumps rather than slower when the bumps have time to deform and flatten slightly. If there is any effect like this then going slower would result in more friction due to more surface area being in contact.