Talking about the Inspection of Printed Samples

During the printing process, the printer's inspection of printed samples is an essential task to ensure the quality of the printed products and ensure the delivery date. Inspection of printed samples requires attention to the following items.

1. Check the ink color. The first impression of whether a print is beautiful or not is the color, whether it is in line with people's visual feelings, aesthetic concepts, etc. The printing master generally judges and demands by the original or color standard. There are many factors that affect the ink color of the printed matter, especially in the on-off test printing stage, because the change of the amount of ink on the layout is erratic, and it is easy to produce coloring changes. This is mainly judged by the accumulated experience of the master printer to effectively control the balance between ink and ink.

2. Check the overprint. We understand that colorful prints are mainly composed of yellow, pink, blue, and black dots. This must ensure the accuracy of overprinting, and the allowable tolerance for overprinting is generally specified as 0.1 mm. There are also many factors that affect overprinting, such as machine cavities, pressure, temperature and humidity in the printing shop, and performance of paper.

3. Check the text. The complete and unambiguous transfer of graphic and text is the premise of guaranteeing quality, so when it is incomplete, it is necessary to find out the reasons, such as depression of the blanket, exposure and development time when publishing. When the content of the print graphic is enlarged or blurred, it is necessary to check the pressure and the change of the ink.

4. Check for printing problems. Always pay attention to whether there is any printing failure, such as ink, dirt, dusting, etc., do a good job offset printing "three Qin" work. At the same time, it is also necessary to check the operation of the machine and the working conditions of the parts, and to inspect the paper feeding, printing, and delivery parts.

At the moment, people's demands for printed matter are getting higher and higher. This virtually puts forward higher requirements for the master printer. It requires a certain amount of professional and technical knowledge, but also must pay attention to the accumulation of certain operating experience and the ability to eliminate faults, in order to adapt The need for ever-growing printing industry.

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