Screen printing machines are representative examples of stencil printing equipment; their printing plate consists of a mesh-woven from materials such as silk-featuring a distinct, crisscrossing warp-and-weft structure. Various types of screen printing machines have been developed, including flatbed, curved-surface, formed-object, textile, printed circuit board, and modern rotary models. Among these, the modern rotary screen printing machine stands out for its high speed and productivity; it features a screen mounted on a cylinder, with ink fed into the cylinder's interior. During operation, the cylinder rotates, and a squeegee rapidly transfers the design onto the substrate.
In addition to silk, screen materials can include nylon, copper, steel, or stainless steel wire. The stencil printing principle utilized by screen printing machines originated in ancient stencil techniques. Stencil printing encompasses various forms, such as mimeography, open-stencil spraying, and screen printing.
Screen printing was initially a manual process, relying on a simple setup comprising a frame, a screen mesh, and a stencil. It was not until the 1950s that the process became mechanized and automated. Rotary screen printing machines deposit a substantial amount of ink, making them ideal for producing prints with thick ink layers. They are capable of printing on a wide range of substrates-including paper, glass, wood, metal, ceramics, plastic, and fabric-and can utilize diverse inks, including conductive metallic inks.