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US 11,447,651 B2Granted
Ink set, inkjet printing device, and inkjet printing method
AssigneeRicoh Company, Ltd.
InventorsToshiyuki Kobashi, Satoyuki Sekiguchi
Life of this patent
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Abstract
An ink set contains a pre-processing fluid containing a multivalent metal ion, a first ink and a second ink, wherein the first ink has a surface tension of 35 mN/m or greater at 25 degrees C. and a life time of 150 ms, wherein the second ink has a surface tension of 35 mN/m or greater at 25 degrees C. and a life time of 150 ms and the second ink is a white ink.
Claims14
An ink set comprising:
- a pre-processing fluid comprising a multivalent metal ion;
- a first ink;
- and
- a second ink,
- wherein the first ink has a surface tension of greater than 35 mN/m at 25 degrees C. and a life time of 150 ms,
- wherein the second ink has a surface tension of greater than 35 mN/m at 25 degrees C. and a life time of 150 ms
- wherein the second ink is a white ink.
4 more elements
An inkjet printing method comprising:
- applying a pre-processing fluid comprising a multivalent metal ion to a recording medium;
- discharging a first ink and a second ink to a portion where the pre-processing fluid has been applied to the recording medium,
- wherein the first ink has a surface tension of greater than 35 mN/m at 25 degrees C. and a life time of 150 ms,
- wherein the second ink has a surface tension of greater than 35 mN/m at 25 degrees C. and a life time of 150 ms
- wherein the second ink is a white ink.
2 more elements
Dependencies are inferred from the claim text.