Large goat hair calligraphy brush from South Korea

Recently, I found someone selling this large goat hair calligraphy brush from South Korea on a flea market website.

The hair portion is 102mm in length with a diameter of 18mm. I needed something of this size for writing larger characters (two rows on 2x6 feet paper) and it was reasonably priced, so I bought it.

It writes reasonably well, though with the large amount of ink it can carry, it is best used with thicker paper (that can hold more water/ink without smudging) or sized/cooked paper (which doesn't absorb water/ink).

For example, this is written on unsized/uncooked paper.

You can clearly see the smudging.

 

This is written on thick unsized/uncooked paper.

There is a lot less smudging, since the paper is able to absorb more ink.

 

This is written on sized/cooked paper.

There is no smudging, but it took quite a bit of time to dry because of all that ink on the surface.
 

In terms of size, this brush seems to work for two rows of characters (7 to 8 characters per row) on a sheet of 2x6 feet paper. I will have to experiment around a bit to see if I can use a smaller brush for the same layout, and how it works for larger characters (5 to 6 characters per row, two rows on 2x6 feet paper).