Stationery Tips

Knowledge of pencils

How to fit the ball

It is a very small ball, and it is very strange why it is turning well without falling below. To make a chip, a thin wire-shaped metal is cut in a cylindrical shape, the end is truncated to a conical shape, a hole is drilled first, and the ball is put in it and beaten from the top. Then, the inside of the tube becomes a saucer shape and it is stabilized. Moreover, because the edge is closed along the ball (caulking), it is said that the ball does not fall.

Back to Stationary Tips


Digital catalog is available for online reading.

General Info Catalog

General Information of Tombow 2022-2023 Lineup of all products of Tombow

Open the catalog

Eco Info Catalog

Information and lineup of environmental products of Tombow

Open the catalog

Downloadable PDF version is available.

Catalogs can be viewed and saved in smartphone, tablet and PC in use of “iCata” digital catalog service.

Product information in catalogs is created at the time of catalog production. Please note that design, specification and other information may change without notification.