A new study took a microscopic look at razors to determine why they go dull when cutting soft material such as hair. The team found that the angle of the hair can have a big impact on how dull the ...
IT TOOK a leisurely 70 years after King Gillette invented the safety razor for someone to come up with the idea that twin blades might be—or, at least sell—better. Since then, the pace of change has ...
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