MARKING PEN INK FOR WRITING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a marking-pen ink for a writing board whose handwriting on a writing board, can easily be erased and whose pigment does not aggregate for a long time and has a better dispersion-stability. SOLUTION: The ink for the writing board constitutes a volatile organic solvent, a resin, a pigment, a releasing agent and epoxidized soybean oil.