The art of nice handwriting

Pens and pencils are part of what I have.  I need them quite often.  It is a need because I write a lot.  One kind of pen that I like are those kind:

I got my first one of this kind when I was a teenager.  Since, I have period where I use them and then, I return to more usual pen.  Those pens abofe are more durable. The ink comes in cartridges.  The part that I like less: it is becoming a bit harder, with time, to find the cardridge.  Or I may not looking at the right place.  I don't mind having a brief period to get at ease to use them again.  I just like the writing it is leaving.  It is my handwriting but with those pens, I feel I have a far more elegant writing than with other pens.  In some period of time, I like to feel fancy when I write!