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Doped black ink with increased light scattering efficiency for nozzle health detection
Doped black ink with increased light scattering efficiency for nozzle health detection
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机译:掺杂黑色墨水,提高了光散射效率,可用于喷嘴健康状况检测
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摘要
A method of monitoring nozzle condition in an array of inkjet nozzles includes ejecting at least one black ink drop from an inkjet nozzle, wherein the black ink includes a black colorant and a colloidal metal or metal-containing dopant. Light from a collimated light source is directed onto an ink drop-in-flight, and light-scatter from the drop is detected. The dopant increases light-scatter by the ink drop of an incident collimated light beam relative to the same ink without the dopant. From the detected light-scatter, an operational condition of the inkjet nozzle is determined. The dopant is visually undetectable in a printed mark made by the black ink, and the ink has a printed black optical density which is substantially the same as that of the same ink without the dopant.
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