Writing comfort also applies to refills and particularly to the quality of the inks chosen by Caran d’Ache. A strict flow control ensures smooth, even handwriting with clean lines, in a large range of colours, over a long period. It is a technology that meets the very highest quality standards – the only standards recognised at Caran d’Ache.

Ink conforms to ISO 12757-1-2 standards
• Caran d’Ache ballpoint pen cartridges have a stainless-steel tip housing a rotating ball made of tungsten-carbide, a metal alloy as hard as a diamond
• Highly precise assembly of the ball into its seat in order to guarantee regular and smooth writing
• The ink flow of each cartridge is tested before it is approved for sale
• Caran d’Ache leads have a high resistance to breakage and provide smooth writing action