The present sheet separation technique provides easy means to separate thin sheets of paper. This configuration allows to visibly recognize the movement of the camera, and increases the design flexibility by covering an internal mechanism. Invitees who accept such invitations may be associated with the inviting bookrunner, and upon being accepted as participants may be granted by the bookrunner access to various sets of communications, documents, and other information concerning the proposed loan. The preform 18 is pressurized and compressed by both of the upper and lower punches 14, 13 to obtain a green compact 19.