PASTE PREPARATION FOR WRITING INSTRUMENTS

摘要

The invention relates to a paste for a ballpoint pen, said paste containing: a colouring means, which can be a colouring agent or a mixture of colouring agents and which comprises at least Solvent Blue 38; a solvent or solvent mixture containing at least diacetone alcohol; and a polymer, which is a polyvinyl butyral resin, for adjusting the viscosity.