bone knifeL240xW8xD15mm, China

There are pen knives and there are paper knives.  Long before the arrival of the computer and the internet, they have both lost their original function.

When we think of pen knife, the image of the Swiss army knife comes to mind (an object of desire in my youth).  However, pen knife was first designated for the use of sharping the nib of quill pens, hence – pen knife.  As for paper knife, there is the image of a sophisticated letter opener (remember the days when one would spend weekends and evenings writing letters?), well paper knife was actually used for cutting open the pages of books that were folded for printing and its edges left uncut.  (this pleaseure of cutting and turning an unseen page cannot even be met with a kindle).