Screen printing process ppt

Next, prop the screen up and place a piece of test paper under the screen which has been precut to the d e s i red size. Screen printing is an example of the stencil printing process. Position your paper and pull a test print to ensure that your image is centered. Introduction screenprinting is a form of stencil printing using a design cut out of a special screen film, attached to a sheet of special fabric that has been tightly stretched across a frame. A free powerpoint ppt presentation displayed as a flash slide show on id. Ppt screen printing powerpoint presentation free to. To make the print, lower the scre e n onto the paper, and pull the squeegee, again. In the early days, fine silk meshes were used as the screen. When problems arise, first do the 5minute overall system check 80% chance that you resolve the problem if specific defects continue to occur, follow logical troubleshooting guidelines.

Screen printing is the most widely used process in the production of printed electronics due to its ability to consistently transfer inks containing a wide range of functional materials onto a. Digital printing is generally defined as any type of print reproduction method that utilizes electronic files to produce a printed piece from spots and dots of ink, toner, or dye. This is a process wherein dirt and oils that have been transferred to the screen are washed away so that the surface is clean and able to adhere evenly to the em ulsion. This is how cotton sarees for everyday use are made. Flat screen and rotary screen machines had by that time made this process very popular for printing. Draw then cut your image read right on the back of the contact paper. The first step in screen preparation is the degreasing process. The printing process sheet offset press sabuj printers. For others its one step in a bigger production chain.

Ink is then forced through the open meshes of the fabric by means of a rubber blade called a squeegee. Screen printing the process of forcing ink through a porous fabric and the open areas of a stencil to produce an image. Measure and tear your good paper and some newsprint paper. Critical parameters, defect scenarios, specifications, and cost reduction article pdf available in soldering and surface mount technology 234. Towards the end of the 19 th century, this process was well developed in japan.