How much hair (in terms of length or days) can a DE razor cut. Does it depend on the blade--feather, derby, merkur? Is it okay to go a week without shaving and then use a DE or is it better to use a DE everyday.
If the razor is sharp enough, which for me means a feather, then you should be able to mow down a week's worth of hair without a glitch. With that being said, I find it easier to get a consitently good shave if I shave at least 5 out of 7 days.