INK BACKFLOW PREVENTER COMPOSITION FOR WRITING INSTRUMENT AND BALL POINT REFILL USING THE SAME
PROBLEM TO BE SOLVED: To provide an ink backflow preventer composition of high practicability excellent in temporal stability and smooth ink follow-up performance that can reliably follow up ink consumption without incapability of following up ink due to residual on adhesion to a wall face even when...
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Format: | Patent |
Sprache: | eng ; jpn |
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