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Nožići za brijanje ( žileti ) se najlepše i najbolje "samooštre" u maketi piramide. Jedan Čeh je to i patentirao.

Nekada su naši stari dooštravali nožiće trljanjem o unutrašnju površinu staklene čaše. uspevalo je i to.

Bravo za starinu od oštrača, prvi put je vidim. 

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25 minutes ago, Leonardo said:

Nožići za brijanje ( žileti ) se najlepše i najbolje "samooštre" u maketi piramide. Jedan Čeh je to i patentirao.

Nekada su naši stari dooštravali nožiće trljanjem o unutrašnju površinu staklene čaše. uspevalo je i to.

Bravo za starinu od oštrača, prvi put je vidim. 

"If we were to take our razor blades and dry them off every time we use them," says Thomas Eagar , professor of materials engineering at MIT's department of materials science and engineering, "they would probably stay sharp for six months." Raising the bar even further, Eagar says that "If I were to rinse my razor with clean water and then dry it off with a hair dryer after that, it would probably last a year."

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