This pencil is marked HB, and the letter HB is on it. This isn’t a legal definition of 2 HB, but there is certainly some precedent for it. If you don’t have two paper 2 HBs with an identical mark, but have one marked HB and the other HB, you are not allowed to make a statement as to what you think the mark represents.
2HB is a letter, like a bar or a colon. You don’t typically mark a paper pencil with a 2HB. However, there are some exceptions. You can use a mark you have already marked the previous pencil with, like “2 HB” or “2 HB + H”, if you were marking your earlier pencil that way. You can also use your mark to indicate where you have just dipped the previous pencil, but you may not use it to indicate where you have just inserted the pencil into the pen. It’s very important that you keep track of your 2HB marks as you take notes and write, as they make a crucial part of your pencil making process.
The other type of mark you may use is “2 HB – X”. This mark is very straightforward. It tells you one unit of thickness of the 2 HB you are making. This is usually called a “marking” thickness. If you already have marked a pencil with a mark that reads “2 HB – X, B”, then you can just use the line “2HB – X” or “HB #2 – X” to indicate the unit for your 2HB. This is a common practice, as long as you mark the unit accurately.
If the mark you are making on paper is different from how you marked the previous pencil, there is no need to use “2 HB – X”. You may use “HB #2 – X”, but you normally should make your 2HB unit a unit of the same thickness as the previous pencil.
It’s still best to make your marks accurately and make the “2HB” mark as clear as possible.
For this example, the “2 HB – X mark” is going to be a mark on the line that says “2 HB – X”. There are some exceptions, but they are a lot better than a 2 HB mark.
5. Writing with the pencil (B)
In a typical fountain pen with no converter, the barrel is pointed upwards, so the tip of the Pencil is in the “B” and “X” marks. For some pen