Sewline Disappearing Naturally Pen 0.8mm

It is a pen that the writing mark disappears in about 1 to 10 days.
(It depends on the environment such as humidity and temperature, and the material of the fabric.)
The pen tip is a ballpoint pen type, and you can roll it on the cloth to write smoothly, so you can write finely without damaging the cloth.
Also, if you want to erase it immediately, you can erase it with water.
The conventional batting type chaco pen is not economical because some ink remains because the batting is soaked with ink, and when the amount of ink is low, it becomes thin and faded.
This naturally disappearing pen contains ink as a liquid, so you can use all the ink and write cleanly to the end without waste.
It's economical.