It is a saturated line to use when you have a little time.
It is made by putting a bundle of white (tobacco) in a uniform line to strengthen the effect.
Because it is filled tightly,
I use it when I can't put a background.
ちょいとした時に使う集中線です。
均一線の中に白の入った束(たば)を入れて効果を強めたものです。
びっしり埋まるので、
背景入れない時に割と使います。