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Epson Develops High Resistant Ink
Seiko
Epson Corp has developed a printer ink with high resistance to light and
abrasion, and has been using it in commercial printers since the end of June
2000.Under standard fluorescent light, protected from direct sunlight,
image quality will be maintained for about 200 years.The ink dyes used
in the firm’s current Colorio printer ink lasts about 15 years, and general
pigment inks about 100 years. In addition, resistance to abrasion has also been
improved, making it harder to crack the image surface due to rubbing, for
example. The special paper required costs more, however, and so the firm does
not plan to use the new ink in the Colorio or similar printer models.The
new ink uses ultrafine pigment particles, encapsulated in clear resin
microcapsules. The pigment itself was specially developed to resist light.
Capsules are only 0.1 micron in diameter, about a tenth of the normal
several-micron size for pigment ink. These are mixed with a solvent to create
the ink. When the ink is ejected from the print head and impacts the paper, the
solvent evaporates or absorbs into the paper, leaving the capsules deposited on
the paper surface. The capsule resin gradually forms a plastic film, coating the
paper surface and improving abrasion resistance.
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