What does a printing factory operator do?

Printing factory operators mainly operate printing machines and select inks.

Ink color is one of the most intuitive indicators, in fact, it is a major indicator that reflects the quality of printed matter to a great extent. Therefore, the quality of pigment plays a decisive role in the quality of ink.

In the printing process, if the thixotropy of ink is poor, there will be printing faults such as "poor ink supply", uneven ink transmission and serious dot gain. In order to prevent the above failures, it is necessary to frequently stir the ink in Mo Dou with an ink spatula, or install an ink stirrer in Mo Dou to support the ink from time to time.

Extended data:

Printing plate making is one of the prepress technological processes. Compared with other processes, the traditional plate-making process has a relatively low degree of automation and many manual processes, mainly relying on the experience of operators.

Process of printing machine:

Working cycle program of flat screen screen printing machine. Taking the flat screen platform monochrome semi-automatic manual screen printing machine as an example, its working cycle is as follows: feeding → positioning → descending → lowering the ink plate and raising the ink return plate → scraping stroke → raising the ink plate → lowering the ink return plate → raising the plate → returning stroke → releasing the positioning → receiving.

In the continuous loop action, as long as the function can be realized, the time occupied by each action should be as short as possible to shorten each work cycle and improve work efficiency.

Impression line In the printing process, ink and screen printing plate are pressed onto the ink plate, so that the screen printing plate and the substrate form a contact line, which is called the impression line. This line is on the edge of the doctor blade, and countless indentation lines form the printing surface. Because the printing stroke is a dynamic process, it is difficult to achieve an ideal nip.

With the development of printing technology, there are more and more varieties of ink and many classification methods. If classified by printing method, there are five types:

(1) letterpress printing inks: book black ink, rotary black ink, color letterpress ink, etc.

(2) Lithographic printing ink: offset printing bright resin ink, offset printing rotary ink, etc.

(3) Gravure printing ink: Gravure printing ink, engraving gravure printing ink, etc. ;

(4) stencil printing ink: reproduction printing ink, screen printing ink, etc. ;

(5) Special inks: foaming ink, magnetic ink, fluorescent ink, conductive ink, etc.

References:

Baidu encyclopedia-printing ink

References:

Baidu encyclopedia-printing machine