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US 2024/0182732 A1Published application
Inkjet ink and inkjet recording apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorArisa NAKANISHI
Life of this patent
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Abstract
An inkjet ink contains quinacridone pigment and aqueous medium. A sulfur concentration in the 10-fold diluent of supernatant liquid obtained by centrifuging the inkjet ink at 1,050,000 G for three hours is 1.0 ppm or more and 6.0 ppm or less. In an ultraviolet and visible ray absorption spectrum of the 25-fold diluent of the supernatant liquid, light absorbance at a predetermined peak is 0.17 or less. The predetermined peak is a maximum peak in a wavelength range of 400 nm or more and 490 nm or less.
Claims9
An inkjet ink containing quinacridone pigment and aqueous medium, wherein
- a sulfur concentration in 10-fold diluent of supernatant liquid obtained by centrifuging the inkjet ink at 1,050,000 G for three hours is 1.0 ppm or more and 6.0 ppm or less, and
- in an ultraviolet and visible ray absorption spectrum of 25-fold diluent of the supernatant liquid, light absorbance at a predetermined peak is 0.17 or less, and the predetermined peak is a maximum peak in a wavelength range of 400 nm or more and 490 nm or less.
Dependencies are inferred from the claim text.