DG, Meaning of the codes.

Guys,
i am in love of DG brushes, I have many and I love all of them.
At the beginning I could not feel the differences in between the various B3, B11, B15 etc.
Now I am a bit more expert and I feel much more the differences.

I woud have a question, what is the progression of the codes? I mean, are B6 or lower numbers still available, what is the concept of the BNumber assignation? Quality? type of fur? How DG name the knots? Based on what?

 

There's a guy on DFS, Dan Law, who has chronicled all of the knots. You might reach out to him.

 

Thank you!