Solvent-based ink composition for thermal inkjets comprising acetate solvent

1. A solvent-based ink composition for a thermal inkjet printhead, said ink composition comprising:

(a) 20-80 wt. % of a compound of formula (C);

wherein:

R 7 is a C 2-12 alkyl group interrupted with 0, 1, 2 or 3 oxygen atoms;

(b) 10-70 wt. % of a C 1-6 alcohol; and

(c) 0.01-25 wt. % of a colorant,

wherein said composition does not comprise and polymers.

2. The ink composition of claim 1 , wherein R 7 is a C 4-8 alkyl group interrupted with 0, 1 or 2 oxygen atoms.

3. The ink composition of claim 1 , wherein said compound of formula (C) is selected from the group consisting of: hexyl acetate; carbitol acetate; butyldiglycol acetate; and methoxypropyl acetate.

4. The ink composition of claim 1 , wherein said C 1-6 alcohol is ethanol.

5. The ink composition of claim 1 , wherein said colorant is a dye or a pigment.

6. The ink composition of claim 1 , further comprising:

0.001-10 wt. % of a surfactant.

7. The ink composition of claim 6 , wherein said surfactant is a nonionic surfactant.

8. The ink composition of claim 1 , consisting essentially of said compound of formula (C), said C 1-6 alcohol and said colorant.

9. The ink composition of claim 1 , consisting only of said compound of formula (C), said C 1-6 alcohol and said colorant.

10. The ink composition of claim 1 , consisting only of said compound of formula (C), said C 1-6 alcohol, said colorant and 0.01-10 wt. % of a surfactant.

11. An ink cartridge for a thermal inkjet printhead, said ink cartridge containing the solvent-based ink composition according to claim 1 .

12. The ink cartridge of claim 11 , wherein said ink cartridge comprises said thermal inkjet printhead integrated therewith.

13. A substrate having an ink composition according to claim 1 disposed thereon.

14. The substrate of claim 13 , which is a semi-porous or non-porous substrate.

15. The substrate of claim 13 , which is a vinyl substrate.