Glossary of Terms: D
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| Dampening | An essential part of the offset printing process whereby rollers distribute a solution to the plate that covers the non-printing area of the plate, repelling ink in those areas. Some newer presses use a waterless ink technology that does not use dampening. |
| Deckle edge | The rough or feathered edge of paper when left untrimmed. |
| Densitometer | An optical device used by printers and photographers to measure and control the density of ink or color. |
| Density | The degree of tone, weight of darkness or color within a photo or reproduction measured by a densitometer. |
| Descender | A term that describes that portion of lower case letters that extends below the main body of the letter, as in "p". |
| Desktop Publishing | Creating materials to be printed using a personal computer, as opposed to taking non-electronic documents to a commercial printing company to be prepared for printing. |
| Die Cutting | The process of cutting paper in a shape or design by the use of a wooden die or block in which are positioned steel rules in the shape of the desired pattern. |
| Digital Proof | Color separation data is digitally stored and then exposed to color photographic paper creating a picture of the final product before it is actually printed with ink. |
| Dithering | The process of averaging between pixels of different colors. This results in a smoother, blended transition between the edge of two areas rather than a jagged or 'stair-step' appearance. Also a method used on ink jet printers where colors are produced by mixing colored dots in a randomized pattern. |
| Dot | The smallest individual element of a halftone. |
| Dot gain | A term used to describe when dots are printing larger than they should. |
| Drill | The drilling of holes into paper for ring or comb binding. |
| Drop shadow | A shadow image placed offset behind an image to create the affect of the image lifting off the page. |
| Dull finish | A semi-gloss finish on paper that is less glossy than gloss and more than matte paper. |
| Dummy | The preliminary assemblage of copy and art elements to be reproduced in the desired finished product, also called a comp. |
| Duotone | A two-color halftone reproduction generated from a one color photo. |
| Dye sublimation | A photographic looking color print created by heating dyes on a substrate instead of using inks. Often used for proofing. |
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Autumn Express
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San Francisco
CA 94110
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