The brush pen tip is connected to the brush assembly and this is the reservoir for the watercolour. There is a valve at the base of the assembly that allows a controlled flow of liquid from the cartiridge to the brush pen tip.
The pens also have a convenient replaceable watercolour cartridge, which provides a continual flow so you can create watercolour effects instantly with no mess or fuss!
TIP: When you are using the brush pens always sqeeze the cartridge until you see colour enter the reservior, but do not continualy squeeze or the brush pen will flood.
The brush pens innovative design allows you to be able to just ‘Pick Up and Paint’ anywhere and at anytime.