Writing instruments with eradicable inks and eradicating fluids

摘要

A writing instrument is disclosed, comprising:a first reservoir containing an ink eradicator, the first reservoir being in fluid communication with a first applicator tip, the ink eradicator comprising a volatile base, a pH sensitive dye and an eradicating agent;a second reservoir containing a combination eradicable and re-write ink, the second reservoir being in fluid communication with a second applicator tip, the combination eradicable and re-write ink comprising one of phosphorus pentoxide (P4O10) or phosphoric acid (H3PO4) or mixtures thereof, and an eradicable dye.