Article: Japanese Inventor Develops Inkjet Black Ink

ALEXANDRIA, Va., May 5 -- Toshiki Taguchi of Fujinomiya, Japan, has developed an inkjet black ink that is capable of giving an image with excellent durability.

An abstract of the invention, released by the U.S. Patent & Trademark Office, said: "The invention provides an inkjet black ink ensuring excellent image durability capable of satisfactorily maintaining the image quality such as non-loosening of black and gradation even when the image is stored for a long period of time, which is a inkjet black ink having a discoloration rate constant of 5.0 times 10 sup -2 [per hour] or less, which is measured by using an ozone gas, the ink comprising an aqueous medium having dissolved or ...

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