Stencils

A stencil is a template used to draw or paint identical letters, symbols, shapes, or patterns every time it is used. Stencil technique in visual art is also referred to as pochoir. Stencils are formed by removing sections from template material in the form of text or an image. more...

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This creates what is essentially a physical negative. The template can then be used to create impressions of the stenciled image, by applying pigment on the surface of the template and through the removed sections, leaving a reproduction of the stencil on the underlying surface. Aerosol or painting stencils must remain contiguous after the image is removed, in order for the template to remain functional. Sections of the remaining template which are isolated inside removed parts of the image are called islands. All islands must be connected to other parts of the template with bridges, or additional sections of narrow template material which are not removed.

A related technique (which has found applicability in some surrealist compositions) is aerography, in which spray-painting is done around a three-dimensional object. This technique is similar to cave paintings dating back tens of thousands of years, where hand print outlines are found surrounded by other artwork, such as paintings of animals. The artist would spray pigment around his hand with his mouth. A hollow bone or reed may have also been employed to direct the stream of pigment.

Silk-screen printing also uses a stencil process, as does mimeography. The masters from which mimeographed pages are printed are often called "stencils." Stencils can be made with one or many colour layers using different techniqes, with most stencils designed to be applied as solid colours. In silk-screening and mimeography, images to be stenciled will be broken down into color layers and multiple stencils are used on the same surface to produce multi-colored images.

Aerosol stencils

Aerosol stencils have many practical applications and the stencil concept is used frequently in industrial, commercial, artistic, residential and recreational settings, as well as by the military, government and infrastructure management. A template is used to create an outline for the image. Stencils templates can be made from any material which will hold its form, ranging from plain paper, cardboard, plastic sheets, metals and wood.

Official use

Stencils are frequently used by official organizations, including the military, utility companies and governments, to quickly and clearly label objects, vehicles and locations. Stencils for official application can be customized, or purchased as individual letters, numbers and symbols. This allows the user to arrange words, phrases and other labels from one set of templates, unique to the item being labeled. When objects are labeled using a single template alphabet, it makes it easier to identify their affiliation or source.

Read more at Wikipedia.org