The heat transfer printing is a new application in the textile industry. Gravure printing is the most common method in the heat transfer printing. The Gravure printing qualities of the paper play a decisive role in the textiles. GRACoL7 breaks with tradition by raising gray balance to a more important status to realize the different printing materials with the same appearance. GRACoL 7 process is accorded with human observation rule .In this paper, We introduce the process, the principle and the parameters of G7 .The purpose was to provide reference for printing industry.