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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.
[citation needed] Silkscreen printing and photochemical machining originally were based on gum bichromate photosensitive materials, where exposure to intense ultraviolet light made previously-soluble gum or gelatin colloids insoluble; after exposure, the exposed surface was washed in water and the unexposed coating dissolved, leaving the ...
The essential tools required are a squeegee, a mesh fabric, a frame, and a stencil. Unlike many other printmaking processes, a printing press is not required, as screen printing is essentially stencil printing. Screen printing may be adapted to printing on a variety of materials, from paper, cloth, and canvas to rubber, glass, and metal.
Silkscreen printing epoxy ink was the established method, resulting in the alternative name. Liquid photo imaging is a more accurate method than screen printing. Inkjet printing is increasingly used. Inkjet printers can print variable data, unique to each PCB unit, such as text, a serial number, or a bar code.
Substrate is used in a converting process such as printing or coating to generally describe the base material onto which, e.g. images, will be printed. Base materials may include: plastic films or foils, release liner; textiles, plastic containers; any variety of paper (lightweight, heavyweight, coated, uncoated, paperboard, cardboard, etc ...
Auto printing machine in a RMG factory of Bangladesh Woodblock printing in Jaipur, Rajasthan, India Woodblock printing in Bagh, Madhya Pradesh, India Design for a hand woodblock printed textile, showing the complexity of the blocks used to make repeating patterns. Evenlode by William Morris, 1883. Evenlode block-printed fabric
Pad printing (also called tampography) is a printing process that can transfer a 2-D image onto a 3-D object (e.g., a ceramic pottery). This is accomplished using an indirect offset ( gravure ) printing process that involves an image being transferred from the cliché via a silicone pad onto a substrate .
Silk screen printing, where the ink is applied directly onto the surface of the glass through a mesh stencil, was patented in 1907. Screen printed transfers, where the image is transferred from a paper onto the glass, was patented in the 1930s by Johnson Mattey. Firing is necessary in both methods in order for the ink to be permanently infused ...
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