Patent ID: 8797594

Claim:
An inkjet printer comprising: an image-forming part that forms an auxiliary layer on a base material by ejecting droplets of an auxiliary ink toward said base material and forms an image on said auxiliary layer by ejecting droplets of an image-forming ink toward said base material, wherein said auxiliary ink changes a dot formation state of droplets of said image-forming ink, and said base material is paper; a storage part that stores a reference table that associates each of a plurality of basis weights of base materials and each of a plurality of types of base materials with a proper dot area rate to be used when forming said auxiliary layer, wherein said proper dot area rate is a dot area rate for forming said auxiliary layer where droplets of said image-forming ink are fixed to form dots of a certain size, and said dot area rate is a dot occupancy rate in an area of predetermined size; and a dot-area-rate determination part that determines a dot area rate to be used when forming said auxiliary layer on a target base material on which an image is to be formed, as an auxiliary ink dot area rate, by referencing said reference table using a type and a basis weight of said target base material.