Thermosensitive recording card, image forming method, and apparatus for making the card

摘要

A thermosensitive recording card medium including a card substrate and a thermosensitive recording portion formed on at least one side of the card substrate and including a thermosensitive recording material which changes transparency and/or color upon application of heat, wherein the card has a deformation quantity not greater than 5 mm, and wherein provided that X is a waviness of the thermosensitive recording portion, and Y is the deformation quantity of the card medium, the relationship of ¦X¦ </= 0.075 . Y<1.4> is satisfied.