If you look at the catalog of Eberhard Faber in 1923,
There are separate pencils for Greg shorthand users and Pittman shorthand users pencils.
As a foreign representative shorthand
There is a Pittman shorthand and a Greg shorthand.
Pitt's trick is to record unvoiced sounds lighter and voiced sounds thicker.
I need shading,
Gregg shorthand is phonetic shorthand, in which every word is recorded phonetically.
Do not use dark or thick lines as a whole.
Peteman shorthand, because the user needs to shade
I prefer a softer writing feel.