MARKING INK COMPOSITION FOR WRITING BOARD

PROBLEM TO BE SOLVED: To provide a marking ink composition for a writing board excellent in erasability of a written line initially and after passage of time regardless of the texture of the writing board. SOLUTION: The marking ink composition for a writing board contains a pigment as a coloring age...

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Bibliographische Detailangaben
1. Verfasser: IMAI YOSHIMI
Format: Patent
Sprache:eng
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