[Investigation of accelerated aging in light and writing age of roller pen inks]

The aging of roller pen ink entries was accelerated in sunlight and ultraviolet, and the extracts of roller pen inks on paper were analyzed by capillary zone electrophoresis, photo diode array (PDA) detector. Scanning range of 190-600 nm was adopted in experiment and the change curves were obtained by the plot of the ratio of peak areas in electrophoretogram vs. accelerated aging. The rule of accelerated aging of roller pen ink was investigated by relative changes in content between different dyes in inks. In addition, the relative writing age of roller pen entries was investigated.