A system configured to improve imaging of a substrate, the system comprising: a reveal substrate comprising: a) an opaque polymer sensitive to at least one first application of at least one selected from heat, pressure and light, said opaque polymer becoming transparent upon being subjected to the at least one first application; and b) a bottom substrate layer having one or more colored areas on a top surface thereof, said bottom substrate layer being disposed such that the one or more colored areas are obscured by the opaque polymer prior to being subjected to the at least one first application and are revealed after at least one portion of the opaque polymer is subjected to the at least one first application; and a print head configured to apply the at least one first application to the at least one portion of the opaque polymer when the reveal substrate moves in a moving direction pass the print head such that the one or more colored areas beneath the at least one portion of the opaque polymer are revealed to provide one or more image dots of the reveal substrate; characterized in that the system further comprises: an optical sensor positioned downstream with respect to print head in view of the moving direction of the reveal substrate, wherein the optical sensor is configured to sense the one or more image dots provided by the revealed one or more colored areas when the reveal substrate moves in the moving direction pass the optical sensor; and a computing and/or printing terminal in digital communication (18, 20) with the print head and the optical sensor and configured to determine alignment or misalignment of the reveal substrate and the print head based on the sensed one or more image dots provided by the revealed one or more colored areas of the reveal substrate. a reveal substrate comprising: a) an opaque polymer sensitive to at least one first application of at least one selected from heat, pressure and light, said opaque polymer becoming transparent upon being subjected to the at least one first application; and b) a bottom substrate layer having one or more colored areas on a top surface thereof, said bottom substrate layer being disposed such that the one or more colored areas are obscured by the opaque polymer prior to being subjected to the at least one first application and are revealed after at least one portion of the opaque polymer is subjected to the at least one first application; and a) an opaque polymer sensitive to at least one first application of at least one selected from heat, pressure and light, said opaque polymer becoming transparent upon being subjected to the at least one first application; and b) a bottom substrate layer having one or more colored areas on a top surface thereof, said bottom substrate layer being disposed such that the one or more colored areas are obscured by the opaque polymer prior to being subjected to the at least one first application and are revealed after at least one portion of the opaque polymer is subjected to the at least one first application; and a print head configured to apply the at least one first application to the at least one portion of the opaque polymer when the reveal substrate moves in a moving direction pass the print head such that the one or more colored areas beneath the at least one portion of the opaque polymer are revealed to provide one or more image dots of the reveal substrate; characterized in that the system further comprises: an optical sensor positioned downstream with respect to print head in view of the moving direction of the reveal substrate, wherein the optical sensor is configured to sense the one or more image dots provided by the revealed one or more colored areas when the reveal substrate moves in the moving direction pass the optical sensor; and a computing and/or printing terminal in digital communication (18, 20) with the print head and the optical sensor and configured to determine alignment or misalignment of the reveal substrate and the print head based on the sensed one or more image dots provided by the revealed one or more colored areas of the reveal substrate. an optical sensor positioned downstream with respect to print head in view of the moving direction of the reveal substrate, wherein the optical sensor is configured to sense the one or more image dots provided by the revealed one or more colored areas when the reveal substrate moves in the moving direction pass the optical sensor; and a computing and/or printing terminal in digital communication (18, 20) with the print head and the optical sensor and configured to determine alignment or misalignment of the reveal substrate and the print head based on the sensed one or more image dots provided by the revealed one or more colored areas of the reveal substrate.