Printing the map

• 11 A press plate is prepared for each map color by exposing the scribed sheets and the lettering negatives. Paper is loaded into a lithographic printing press, and the first color is printed. The press plate and ink are changed and the paper is run through the press a second time to print the second color. This process is repeated until all the colors have been printed. Some of the largest presses can print up to five colors in sequence without changing plates or reloading the paper.