Interference-tone water-based lnks for writing instruments
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United States of America Patent
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-
N/A
Issued Date -
Nov 21, 2002
app pub date -
Oct 2, 2001
filing date -
Feb 19, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Provided is an ink for writing instruments which contains an interference pigment as a colorant and is designed to change the color tone of a line drawn with the ink depending on the darkness of a writing surface. The ink for writing instruments therefore contains an interference pigment coated, on the surface of a flaky minute base material, with a metal oxide having a high refractive index.
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