article_snippet: This has revealed how the blade cuts through the hair, and in the case of multiple-blade models, the bladepulls the hair up,  the second cuts the blade, the blade acts in a similar way to the first, and so on.
article_snippet: This has revealed how the blade cuts through the hair.
article_snippet: In the case of multiple-blade models, the blade pulls the hair up, the second cuts the blade, the third blade pulls and so on .
highlights_snippet: Dr Kristina Vanoosthuyze footage reveals what happens as multi-blade razors move over hairs .
  