Silkscreen T-Shirt Method

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  • Topic: Screen-printing, Printmaking, Printed circuit board
  • Pages : 5 (1083 words )
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  • Published : May 20, 2013
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THE BASICS OF SILK SCREENING

WWW.PROTOCASE.COM

© Protocase Inc. All rights reserved Document edition – 1.2 Last updated: March, 2007 Toll free: 1-866-849-3911 (US & Canada only) Tel: 1-902-567-3335 Fax: 1-902-567-3336 Email: info@protocase.com

Table of contents Introduction ………………………………………………………….. 3 The Silk Screen Process ………………………………………………….. 3 Graphics Process ………………………………………………….. 3 Text ………………………………………………………………….. 4 Other TIPS ………………………………………………………….. 5 Color ………………………………………………………………….. 6 Silk Screen Samples ………………………………………………….. 7 References ………………………………………………………….. 8

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Introduction Silk screening, also known as screen-printing or serigraphy, is a printing technique that involves passing ink through a porous fabric, thus creating a sharp-edged single-color image [1] created from a stencil. Multiple color images are realized by incorporating multiple stencils, one graphic and screen for each color. Silk screening is the process Protocase utilizes to provide labeling for connectors, switches, ports and other components, as well as company logos, graphics or text. The Silk Screen Process The process begins with the client providing either an electronic image of the required print or a sketch of the required print with enough detail so a Protocase technical representative can create a suitable electronic image. When providing an electronic image, clients must be aware that the image quality is critical to the resulting final screened image that can be achieved. The porous fabric Protocase uses for its screens contains 300 threads per inch; therefore the image we receive from out clients must be of at least that much detail. In other words, images less than 300 dots per inch (dpi) will not be of desired quality and may result in either blurred or jagged edges. Once the image (one image for each color to be screened) is received from the client, it is then printed on velum using a laser printer. Screens are prepared to have the image burnt in by first applying a swipe of emulsion, an ultra-violet sensitive liquid, to the screen and then let dry in a dark room for 2 hours. The print is then taped to the screen and burned under an ultra-violet light for 6 minutes. The screen is then washed with a high pressure washer which removes all the emulsion hidden by the image, thus leaving a sharp, porous, representation of the image in the screen. The screen is then fitted to an apparatus that allows the enclosure or panel to be mounted under the screen and properly aligned. Ink is then applied to the top surface of the screen and is then squeezed over the porous image allowing the ink to pass through to the enclosure or panel underneath. The panel is then removed and baked in an oven for 15 minutes. The process is then repeated for each color applied. The following information offers tips and suggestions that will help optimize the silkscreening process Graphics Process Images can be provided in a variety of formats. We can accept most file formats, but the most common are the following, in order of our preference: • • •

Adobe Illustrator (AI), Portable Document Format (PDF), Photoshop Document (PSD)

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Drawing (DWG), and Drawing Exchange Format (DXF) format.

For other file format please contact our technical support. As mentioned previously when providing an electronic image, clients must be aware that the image quality is critical to the resulting final screened image that can be achieved. The porous fabric Protocase uses for its screens contains 300 threads per inch; therefore the image we receive from out clients must be of at least that much detail. In other words, images less than 300 dots per inch (dpi) will not be of desired quality and may result in either blurred or jagged edges.

Resolution less than 300 Dpi

Resolution greater than 300 Dpi

Please note that the final quality of the screen print is affected by the type of powder coat finish chosen for the enclosure. Heavily...
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