Ink limit is a expressed as a percentage to show the maximum amount of ink used in a particular process. In offset printing the limit is typically how much ink the paper is able to absorb (often 320%) and in digital printing it relates to the thickness of toner the fuser can effectively melt (often 260%). Each individual ink has a maximum of 100%. The recommended rich black is C 40% + M 30% + Y 30% + K 100% for a total ink coverage of 200%.