Silhouette 

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Generally speaking, an outline or profile of a shape or object, commonly filled with a solid color (such as black). A silhouette halftone is a portion of a halftone image that has …

Silhouette Halftone 

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A means of halftone reproduction in which a specific portion of the image is outlined (or silhouetted) by removing thehalftone dots which surround it. Also known as an outline halftone.

Simplex

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The printing of an image on only one side of a sheet of paper. See also Duplex (first definition). In telecommunications, simplex is used to refer to a circuit which can only …

Smooth Finish 

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A paper finish characterized by a level surface free of irregularities and contours, produced by a high degree of wet pressing or by calendering.

Smoothness 

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Measure of the evenness or lack of contour of a paper’s surface. In terms of basic printability, a surface as free as possible of irregularities is desirable, but smoothness is …

Solvent

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Any substance capable of dissolving another to form a solution. A common, everyday solvent is water, in which substances like sugar, salt, or instant coffee can be dissolved. In many …

Spot Color

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In multi-color printing, a color that is added in an individually specifiable region of a printed sheet, used to highlight individual page elements, such as logos, headlines, line art, etc., distinguished from process color in …

Spot Varnish

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A varnish applied only to portions of a printed piece after printing, rather than to the entire sheet, typically for aesthetic purposes. Spot varnishing is commonly found on book covers, in which …

Stairsteps

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In screen printing, an alternate term for sawtooth. See Sawtooth. In digital imaging, an alternate term for jaggies or the effects of aliasing. See Aliasing.