Patent ID: 7147312

Claim:
A liquid accommodation container for accommodating a liquid, comprising: walls for constituting the liquid accommodation container; a liquid accommodation chamber formed in the liquid accommodation container; a liquid supply port formed through one of the walls of the liquid accommodation container for supplying the liquid accommodated in the container to the outside; and an optical member disposed on the one of the walls, wherein a light dispersing member is bonded on the surface of the optical member, wherein a part of the optical member faces inward of the liquid accommodation chamber and has a function for reflecting light, which is incident from the outside, to the outside when no liquid is present in the liquid accommodation chamber and not reflecting the light, which is incident from the outside, to the outside when the liquid is present in the liquid accommodation chamber, and when the optical characteristics of a material of the liquid accommodation container are measured based on a standard according to JIS K7105, the material has optical characteristics which are equivalent to the optical characteristics that a transmittance of all light beams is 80% or more and a Haze value is equal to or more than 75% and equal to or less than 85%.