The process in which the least dominant process color is replaced with an appropriate value of black in areas where yellow, magenta and cyan overprint 

The process of adjusting the color in a scanned image so that it more closely matches the original image, or to compensate for flaws (such as overexposure, unexposure or color casts) in the original image

The software "Illustrator" allows you to 

The process used to transfer a coloured layer of wax or thermoplastic material from a ribbon to a substrate using heat

The expansion for MICR in security printing 

------------- layer of the waterless offset plate acts as the non image area