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Serigraphy

 

What is it?

Screen printing is a printing process that involves passing of ink through a very fine screen.

Screen printing is often considered a stencil technique.

The screen (consisting of a fabric stretched over an aluminum frame) is coated with a photosensitive emulsion (coating) that hardens when exposed to ultraviolet radiation (sunlight) and the mouth tissue. The ink does not pass.

A film is positioned on the screen coating before exposure and can block ultraviolet rays to where you want the ink to pass through the mesh fabric. The protected emulsion ultraviolet does not harden, it is removed with water.

The screen thus prepared for the draw can be installed on the screen printing machine. Scrapers and against-scrapers are also in place and the ink is deposited on the fabric of the screen. The print medium is fed into the machine and held in position during the printing process with a vacuum table.

The ink is spread on the screen using a squeegee and a counter squeegee (topping), then the screen goes down on the print support to the level of off-contact. The pressure of the scraper used to apply the ink through the mesh fabric to show the motifs.

After printing, the screen is raised, the carrier removed, washed and dried.

The Advantages

Screen printing is a process that can print many different and varied designs at the same time and specific inks will be used depending on the type of design. One of the advantages of screen printing is to vary the deposit of ink by the use of more or less fine mesh screen. This technique allows a high ink deposit (5 to 10 times higher than other printing processes), which not only guarantees an intense color that lasts over time, but also a good opacity.