Cartridge for writing, drawing, painting implements has hollow chamber and ratio of more than 4 between outer cartridge diameter and inner chamber diameter

摘要

The cartridge (1) has an outer diameter (D) and a hollow chamber (2) with a diameter (d) extending in longitudinal direction. The ratio between the diameters is greater than 2, e.g. greater than 4. The cartridge has a circular, oval, triangular, hexagonal or star-shaped profile. The hollow chamber is filled with a material, which is different from that of the cartridge. The material does not give off any color, and contains wax, in a ratio of more than 50% of volume.