Water-colour fluorescent ink for writing instrument.

摘要

A water-colour fluorescent ink for writing instruments comprises: 30 to 70% by weight of a dyed material obtained by providing a monomeric mixture consisting of 10 to 80%, preferably 30 to 55%, by weight of acrylonitrile, 0.5 to 20% by weight of (metha)acrylic acid, and the balance of styrene, emulsifying and polymerising the monomeric mixture to provide emulsified polymers of a particle diameter less than 0.5 mu m, and dyeing the emulsified polymers with a fluorescent dye; and 5 to 35% by weight of a hydrophilic organic solvent.