Interference-tone water-based lnks for writing instruments
AssigneeZebra Co., Ltd.
InventorMayumi Terai
Life of this patent
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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.
Claims12
An interference-tone water-based ink for writing instruments, which comprises an interference pigment obtained by coating the surface of at least one flaky minute base material selected from a silicate glass and mica with titanium dioxide (TiO2) to give the thickness of the coating layer falling within a range of 60 to 160 nm and having an average particle size of 5 to 125 μm.
A writing instrument comprising an interference-tone water-based ink which contains an interference pigment obtained by coating the surface of at least one flaky minute base material selected from a silicate glass and mica with titanium dioxide (TiO2) to give the thickness of the coating layer falling within a range of 60 to 160 nm and has an average particle size of 5 to 125 μm.
Dependencies are inferred from the claim text.