Usually, the printing plates for work of this class are attached to patented base, instead of being locked up in forms in the ordinary manner. The patented base allows for rapid adjustment of the printing plates for close register color printing.
The Uprightgrain Printing Bases, made by J. W. Pitt, Inc., of Bath, N. Y., are useful and economical for all classes of folding box printing, and this base is now being used in a large number of box-making plants.
The Wesel Printing Base system, made by F. Wesel Manufacturing Co., of Brooklyn, N. Y., is another good base that is adapted to the highest grade of register color printing.
When imposing large forms of half tones or electrotype plates on patented base, no regular printers’ furniture is required, and the plates are placed in the necessary positions in very short time.