The quality of the product or service is very important in all branches of production or business. Quality control of product or service is conducted through measuring and monitoring in order to determine whether that product or service meets certain specifications, standards and requirements. Implementation of this discipline is facilitated by using statistical quality control, which contains certain tools that are used for inspection of process, products or services. One of those very important tools, are control charts that provide graphic view and monitoring of measured values and their nature, whether the value is situated inside or outside of previously determined limits. Control charts can vary depending on use. There are control charts for variables and those that are used for attributs. Beside this division of charts, there are also subspecies of mentioned charts that are used depending on which process is being controlled. Graphic industry is one of many which use quality control. First of all, there are certain conditions to be fulfilled in order to make a good product and gain a customer's satisfaction, but also compliance to prescribed standards. One of many parameters being measured in printing, and therefore most important, is the color density.