Why shaving dulls even the sharpest of razors

Engineers have studied the simple act of shaving up close, observing how a razor blade can be damaged as it cuts human hair -- a material that is 50 times softer than the blade itself. They found that hair shaving deforms a blade in a way that is more complex than simply wearing down the edge over time.

from Top Technology News -- ScienceDaily https://ift.tt/33yfeok