Heidelberg 4C printing

Heidelberg printing machine can print 4 colors at a time.

A four-colour printing press is a lithographic printing press which USES black, medium blue, brown and green inks to reproduce maps.Print in subtractive primary colors (yellow, magenta, blue) and black.If the use of yellow, magenta, blue, black ink other than the four-color ink to copy the original color printing process, should not be called "four-color printing", but should be called "spot color printing" or "point color printing"