Pigment composition, identification medium, and authenticity determination method

A pigment composition comprising a mixture of:

• a first cholesteric liquid crystal pigment;
• and a second cholesteric liquid crystal pigment, wherein:
• at least one of the first cholesteric liquid crystal pigment and the second cholesteric liquid crystal pigment is in flake form,
• an average particle diameter of the flakes is 20 μm or more and 120 μm or less,
• the first cholesteric liquid crystal pigment is a pigment having:
• a center wavelength of a selective reflection band within a wavelength range of 400 nm or more and 800 nm or less;
• and a selective reflection bandwidth of 150 nm or less;
• the second cholesteric liquid crystal pigment is a pigment which has a selective reflection bandwidth of 200 nm or more within a wavelength range of 400 nm or more and 800 nm or less;
• the selective reflection band of the first cholesteric liquid crystal pigment and a selective reflection band of the second cholesteric liquid crystal pigment at least partially overlap with each other;
• and
• a containing amount of the first cholesteric liquid crystal pigment relative to a total amount of the first cholesteric liquid crystal pigment and the second cholesteric liquid crystal pigment is more than 30% by weight and 75% by weight or less.