1 / 17

Screen Printing

Screen Printing. Historical Background. Egyptians and Greeks used stenciling 1907, Samuel Simon of Manchester England patented process of using silk fabric as printing screen John Pilsworth developed multicolor process of silk screening. Screen Printing.

lafayette
Download Presentation

Screen Printing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Screen Printing

  2. Historical Background • Egyptians and Greeks used stenciling • 1907, Samuel Simon of Manchester England patented process of using silk fabric as printing screen • John Pilsworth developed multicolor process of silk screening

  3. Screen Printing • Advantages: Print on any surface that will accept ink • Print on irregular/ cylindrical surfaces • Print thick abrasion and weather resistant ink films

  4. Process • Screen Printing Process-Scoop coat mesh with Direct Stencil • Output positive separations • Expose your emulsified screen with high intensity bulb, this will harden the emulsion on screen • Wash out the exposed areas of emulsion • Blackout any areas that may have been exposed or accidentally blown out

  5. Process Cont. • Tape edges of the screen, where there is not emulsion. (this helps with clean-up) • Mount and position from on the press • Begin to print • Remember to clean your screen • Wash and position frame on the press • Use chemical spray to remove your stencil • Use chemical called Dehaze to remove any shadow left behind • Degrease your screen, this allows your next image to better adhere to your screen

  6. Screen Printing Components • Wooden Frame • Easy to build • Low Cost • Subject to expansion and contraction, which also means that it is subject to damage and warping due to the chemicals and or the water used during the screen printing process • Need to coat with water proof sealer

  7. Screen Printing Components • Steel/Aluminum • Expensive compared to wood frames • Less prone to damage from chemicals • More rigid than wood frames, retains size • Frames larger than 36x36” should be constructed of steel

  8. Screen Fabric Types • Natural silk, which has limited use today • Synthetic polyester, nylon, which has a wide array of applications • Metal mesh, for use with heated inks on poly

  9. Fabric Tension • Need correct tension to produce quality printing • Fabric manufactures provide tension specs • Measure by percent stretch measure by tension meter

  10. Stencils • Hand cut stencils • Paper cuts • Inexpensive • Not used for production runs • Placed under the screen

  11. Stencils • Water soluble • 2 layers, support layer and gelatin layer • Cut and remove gelatin layer • Adhere under the screen • Cannot use water soluble inks

  12. Stencils • Burned Edges • Material cut wit dull knife • Fabric not degreased before adhering fabric • Screen was not immediately dried after area is washed away

  13. Stencils • Indirect, which means that it is exposed separately from the screen fabric • Can be exposed in a plate-maker • Stencil has three layers • Light sensitive gelatin layer • Support base • Adhesive layer to bond gelatin and base

  14. Stencils • Direct, a thin coat of light sensitive emulsion applied to screen fabrics • Expose in a deep bottom vacuum frame • Image area hardened and non-image area washed away

  15. Masking/Taping Screen • Masking works will for blocking non-image areas in production runs, that way the ink will not run off the screen and clean up will be easier

  16. Screen Printing Inks • Match ink to substrate • Plastisol used for textiles • Required high intensity heat to dry • Lacquer based if used for wood

  17. Printing • Use of a squeegee to draw the puddle of ink across the stencil opening with one smooth motion. • This should be done at a 60 deg. Angle In class we will be using a water-soluble stencil The fabric that will be used is Polyester

More Related