The present invention relates to adhesive and sealant compositions in non-flowable form. The image forming apparatus includes an image formation control unit configured to select and form a misalignment correction pattern used in a misalignment correction process for correcting misalignment between the single-color images. This leads to advantages in terms of spring structure and cost and independence of the resilient bias with respect to disc position and disc relationship to another disc and with respect to simplicity of mounting and avoidance of dirt entrapment.