Liquid storage container and liquid filling method and liquid refilling method using the same

A liquid storage container comprising:

• a liquid containing body to contain liquid therein and is formed of a flexible film;
• a liquid lead-out member connected to the liquid containing body;
• and
• a spacer member in the shape of a coil spring disposed in the liquid containing body,
• wherein the liquid containing body deforms in a direction in which inner wall surfaces of the flexible film facing each other are brought into contact with each other at the time of reduction in the remaining amount of the liquid as the inside liquid is taken out through the liquid lead-out member, and
• the spacer member includes a contact regulating member that is in contact with parts of the inner wall surfaces of the flexible film facing each other at the time of reduction in the remaining amount of the liquid to thereby regulate contact between the parts of the inner wall surfaces and to form a remaining liquid space where liquid remains;
• wherein, assuming that pressure for deformation in a direction where the inner wall surfaces of two flexible films facing each other are brought into contact with each other when the liquid is taken out is set at a first pressure, the contact regulating member elastically deforms in a direction in which the remaining liquid space is reduced when a second pressure exceeding the first pressure is given;
• wherein the spacer member is disposed at a lower side of the liquid containing body in the gravity direction, and
• wherein the liquid in the liquid containing body comprises pigment ink.