Kakšen je pravi namen luknje v pokrovčku pisala Bic?

Na cevki peresa je še ena majhna luknjica , ki je pogosto nevidna.

👉 Ta ima drugačno funkcijo:

  • Pomaga uravnavati zračni tlak
  • Pomaga, da črnilo pravilno teče
  • Brez njega lahko pero slabo piše ali pušča

➡️ Zrak nadomešča črnilo med pisanjem.

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