Claims
- 1. An ink jet ink composition comprising from about 30 to about 90% by weight of water, from about 0.5 to about 30% by weight of a pigment, from about 0.1 to about 10% by weight of a swelling clay of montmorillonite, bentonite, clinoptilolite, vermiculite, magadite, smectite, laponite or beidellite, and from about 10 to about 50% by weight of a humectant comprising a polyhydric alcohol or a nitrogen-containing cyclic compound.
- 2. The composition of claim 1 wherein said swelling clay is laponite.
- 3. The composition of claim 3 wherein said laponite is
- [(Si.sub.8).sup.IV (Mg.sub.4.8 Li.sub.0.4).sup.VI.O.sub.20 (OH).sub.4 ]1.34Na.sup.+.
- 4. The composition of claim 1 wherein said swelling clay is present at a concentration from about 0.25 to about 5% by weight of said ink jet ink composition.
- 5. The composition of claim 1 wherein said pigment is present at a concentration of from about 1% to about 5% by weight of said ink jet ink composition.
- 6. The composition of claim 1 wherein said polyhydric alcohol is a mixture of glycerol and diethylene glycol.
- 7. The composition of claim 6 wherein said mixture of glycerol and diethylene glycol is present at a concentration of from about 15 to about 30 wt. % by weight of said ink jet ink composition.
CROSS REFERENCE TO RELATED APPLICATION
Reference is made to commonly-assigned, copending U.S. patent application Ser. No. 09/203,261, filed of even date herewith, (Docket 78778HEC) entitled "Ink Jet Printing Method", the teachings of which are incorporated herein by reference.
US Referenced Citations (7)