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Full color images are printed byoverlapping and combining Cyan,Magenta, Yellow, and Black (CMYK)onto the transfer paper to create afull color image. To print ANYmulticolor image the same fourtranslucent colors (CMYK) are used.
In addition to the Print Gocco model that was available in the USA, I lugged a fancier model back from Japan that has a better registration system. It would be fun to get more use out of that. I do still have exposed screens I made for it and, a handful of unexposed screens. I am not optimistic those are still good at this point, though.
I got mine just before the new year, and basically settled on 1000/70/270. I ran from 10-65 power at 5 power increments before I got there. I spent some time looking at the xtool guides before I just finally started lower and increased, every time, taking it out and looking at it through the light until there were no artifacts. The tshirt I printed looked really pretty good for a first attempt.
Screenprinting is a process where ink is forced through a mesh screen onto a surface. Making certain areas of the screen impervious to printing ink creates a stencil, which blocks the printing ink from passing through the screen. The ink that passes through forms the printed image.
A printing screen consists of a fine mesh fabric that is tightly stretched and attached to a metal or wooden frame. Traditionally these screens were made of silk, but today they are most often made of synthetic materials such as terylene.
Once the screen has been prepared, it is placed in hinges affixed to a board or screenprinting table, which has hinges at the top and holes in the surface that allow a vacuum to hold a sheet of paper in place during printing. A thick bead of ink is applied along the top of the inside of the screen and then pulled evenly across the image using a squeegee, an action known as "flooding the screen."
A sheet of paper is then placed under the screen, and with another pass of the squeegee the ink is pushed through those areas of the screen that are not blocked by the stencil. The resulting impression follows the direction of the matrix.
If the composition requires more than one color, the printmaker must repeat the process using a different stencil for each color. To keep the colors of the composition aligned, the printmaker must take precautionary measures to ensure the proper registration of the sheet of paper and the screen.
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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 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. This causes the ink to wet the substrate and be pulled out of the mesh apertures as the screen springs back after the blade has passed. One colour is printed at a time, so several screens can be used to produce a multi-coloured image or design.
Traditionally, silk was used in the process. Currently, synthetic threads are commonly used. The most popular mesh in general use is made of polyester. There are special-use mesh materials of nylon and stainless steel available to the screen-printer. There are also different types of mesh size which will determine the outcome and look of the finished design on the material.
The technique is used not only for garment printing but for printing on many other substances, including decals, clock and watch faces, balloons, and many other products. Advanced uses include laying down conductors and resistors in multi-layer circuits using thin ceramic layers as the substrate.
Screen printing was largely introduced to Western Europe from Asia sometime in the late 18th century, but did not gain large acceptance or use in Europe until silk mesh was more available for trade from the east and a profitable outlet for the medium discovered.
A group of artists who later formed the National Serigraph Society, including WPA artists Max Arthur Cohn, Anthony Velonis and Hyman Warsager, coined the word "serigraphy" in the 1930s to differentiate the artistic application of screen printing from the industrial use of the process.[3] "Serigraphy" is a compound word formed from Latin "sēricum" (silk) and Greek "graphein" (to write or draw).[4]
Historians of the New York WPA poster shop give sole credit to Anthony Velonis for establishing Silkscreen methods used there, a reputation bolstered by the publication of his 1937 booklet Technical Problems of the Artist: Technique of the Silkscreen Process. Guido Lengweiler has corrected this misunderstanding in his book, A History of Screen Printing, published in English in 2016. Outgrowths of these WPA poster shops, at least two New York City studios in wartime started decorating ceramic tiles with fire-on underglaze applied by silkscreen starting as early as 1939: Esteban Soriano and Harold Ambellan's workshop called Designed Tiles.[5]
The Printers' National Environmental Assistance Center says, "Screenprinting is arguably the most versatile of all printing processes. Since rudimentary screenprinting materials are so affordable and readily available, it has been used frequently in underground settings and subcultures, and the non-professional look of such DIY culture screenprints have become a significant cultural aesthetic seen on movie posters, record album covers, flyers, shirts, commercial fonts in advertising, in artwork and elsewhere.[verify]
Credit is given to the artist Andy Warhol for popularising screen printing as an artistic technique. Warhol's silk screens include his 1962 Marilyn Diptych, which is a portrait of the actress Marilyn Monroe printed in bold colours. Warhol was supported in his production by master screen printer Michel Caza, a founding member of Fespa.[6][7]
Sister Mary Corita Kent gained international fame for her vibrant serigraphs during the 1960s and 1970s. Her works were rainbow coloured, contained words that were both political, and fostered peace and love and caring.
American entrepreneur, artist and inventor Michael Vasilantone started to use, develop, and sell a rotatable multicolour garment screen printing machine in 1960. Vasilantone later filed for a patent[8] on his invention in 1967 granted number 3,427,964 on 18 February 1969.[8] The original machine was manufactured to print logos and team information on bowling garments, but was soon directed to the new fad of printing on T-shirts. The Vasilantone patent was licensed by multiple manufacturers and the resulting production and boom in printed T-shirts made this garment screen printing machine popular. Screen printing on garments currently[when?] accounts for over half of the screen printing activity in the United States.[9]
Graphic screen-printing is widely used today to create mass- or large-batch produced graphics, such as posters or display stands. Full colour prints can be created by printing in CMYK (cyan, magenta, yellow and black).
Screen printing lends itself well to printing on canvas. Andy Warhol, Arthur Okamura, Robert Rauschenberg, Roy Lichtenstein, Harry Gottlieb and many other artists have used screen printing as an expression of creativity and artistic vision.
Another variation, digital hybrid screen printing, is a union between analog screen printing and traditional digital direct-to-garment printing, two of the most common textile embellishment technologies in use today. Essentially, digital hybrid screen printing is an automatic screen-printing press with a CMYK digital enhancement located on one of the screen print stations. Digital hybrid screen printing is capable of variable data options, creating endless customizations, with the added ability of screen print specific techniques.
A screen is made of a piece of mesh stretched over a frame. The mesh could be made of a synthetic polymer, such as nylon, and a finer and smaller aperture for the mesh would be utilized for a design that requires a higher and more delicate degree of detail. For the mesh to be effective, it must be mounted on a frame and it must be under tension. The frame which holds the mesh could be made of diverse materials, such as wood or aluminum, depending on the sophistication of the machine or the artisan procedure. The tension of the mesh may be checked by using a tensiometer; a common unit for the measurement of the tension of the mesh is Newton per centimeter (N/cm).
Before printing occurs, the frame and screen must undergo the pre-press process, in which an emulsion is 'scooped' across the mesh. Once this emulsion has dried, it is selectively exposed to ultra-violet light, through a film printed with the required design. This hardens the emulsion in the exposed areas but leaves the unexposed parts soft. They are then washed away using a water spray, leaving behind a clean area in the mesh with the identical shape as the desired image, which will allow passage of ink. It is a positive process.
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