Common problems in the printing process are mainly divided into four categories: offset printing, flexographic printing, gravure printing and digital printing. The core focusses on the six aspects of colour, overprinting, ink colour, paper, equipment and environment. The following are the most common and easily encountered problems:
I. Colour and ink colour problems (the most common) II. Otprinting and registration problems III. Paper and material problems IV. Network and graphic problems V. Equipment and operation problems VI. Environment and drying problems VII. Special problems of digital printing
