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Screen printing is a printing technique where a mesh is used to transfer ink (or dye) onto a substrate, except in areas made impermeable to the ink by a blocking stencil.A blade or squeegee is moved across the screen in a "flood stroke" to fill the open mesh apertures with ink, and a reverse stroke then causes the screen to touch the substrate momentarily along a line of contact.
Silk screen printing uses etch-resistant inks to create the protective mask. Photoengraving uses a photomask and developer to selectively remove a UV-sensitive photoresist coating and thus create a photoresist mask that will protect the copper below it. Direct imaging techniques are sometimes used for high-resolution requirements.
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Silk screening is a type of printing on paper or textiles, in which an ink is embedded in the cloth. The ink is controlled through the use of a stencil, which is placed directly over the paper or textile. This process can only handle one color of ink at a time.
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Cost-effective run length Offset printing: rollers 1 MPa 40–100 Pa·s 0.5–1.5 μm high print quality > 5,000 (A3 trim size, sheet-fed) [57] > 30,000 (A3 trim size, web-fed) [57] Rotogravure: rollers 3 MPa 50–200 mPa·s 0.8–8 μm thick ink layers possible, excellent image reproduction, edges of letters and lines are jagged [58] > 500,000 ...