Ejection liquid, ejection method, method for forming liquid droplets, liquid ejection cartridge and ejection apparatus

A liquid-ejection method by employing a liquid-ejection device comprising a liquid-ejection head for ejecting a liquid by the thermal inkjet system, a tank for holding a liquid, a liquid-feeding path for supplying the liquid holding in the tank to the liquid-ejection head,

• the method comprising the step of ejecting the liquid from the ejection head by supplying the liquid holding in the tank to the ejection head through the liquid-feeding path and applying a thermal energy to the liquid supplied, and the liquid comprising:
• at least one protein or peptide;
• at least one amino acid selected from the group consisting of proline, glycine, glutamic acid, aspartic acid, valine, threonine, alanine, serine, leucine, and isoleucine, or a salt thereof;
• a polyoxyethylene sorbitan fatty acid ester;
• and
• a liquid medium containing water as a main component.

A liquid-ejection method by employing a liquid-ejection device comprising a liquid-ejection head for ejecting a liquid by the thermal inkjet system, a tank for holding a liquid, a liquid-feeding path for supplying the liquid holding in the tank to the liquid-ejection head,

• the method comprising the step of ejecting the liquid from the ejection head by supplying the liquid holding in the tank to the ejection head through the liquid-feeding path and applying a thermal energy to the liquid supplied, and the liquid comprising:
• at least one protein or peptide;
• at least one amino acid selected from the group consisting of proline, glycine, alanine, valine, leucine, isoleucine or a salt thereof;
• at least one surfactant selected from the group consisting of N-lauroylsarcosine, N-acylglycine, N-acylglutamic acid and alkylamide propylbetaine;
• and
• a liquid medium containing water as a main component.