Glossary of Terms: R – S – T
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | Type of Paper |
| R | |
| Rag paper | Papers with a complete or partial content of cotton fibers. |
| Ragged left | The term given to right-justified type that is uneven on the left. |
| Ragged right | The term given to left-justified type that is uneven on the right. |
| Ream | 500 sheets of paper. |
| Register | The arrangement of two or more printed images in exact alignment with each other. |
| Register marks | Any crossmarks or other symbols used on a press sheet to assure proper registration. |
| RGB | The color space of Red, Green and Blue. These are the primary colors of light, which computers use to display images on your screen. An RGB computer file must be translated into the CMYK (the primary colors of pigment) color space in order to be printed on a printing press. |
| Right angle fold | A term that denotes folds that are 90 degrees to each other. |
| Running head | A title at the top of a page that appears on all pages of a book or chapter of a book. |
| S | |
| Saddle stitch | The binding of booklets or other printed materials by stapling the pages on the folded spine. |
| Safety paper | A paper that shows sign of erasure so that it cannot be altered or tampered with easily. |
| Scoring | To crease paper with a metal rule for the purpose of making folding easier. |
| Screen angles | The placement of halftone screens to avoid unwanted moiré patterns. Frequently used angles are black 45º, magenta 75º, yellow 90º, and cyan 105º. |
| Screen ruling | A measurement equaling the number of lines or dots per inch on a halftone screen. |
| Scum | Unwanted deposits of ink in the non-image area of a printed piece. |
| Self cover | A cover that is the same paper stock as the internal sheets. |
| Sharpen | To decrease the dot size of a halftone, which in turn decreases the color strength. |
| Sheetwise | The printing of two different images on two different sides of a sheet of paper by turning the sheet over after the first side is printed and using the same gripper and side guides. |
| Show through | When the printing on one side of a sheet is seen from the other side, a frequent problem with thin papers. |
| Side guide | The guides on the sides of a printing press that consistently positions the sheet sideways as it is fed through the press. |
| Side stitch | The stapling of sheets or signatures on the side closest to the spine. |
| Signature | A printed sheet with multiple pages on it that is folded so that the pages are in their proper numbered sequence, as in a book. |
| Smoothness | That quality of paper defined by its levelness that allows for pressure consistency in printing, assuring uniformity of print. |
| Spiral bind | A type of binding where a metal or plastic wire is spiraled through holes drilled along the binding side of a document. |
| Stock | A term for unprinted paper. |
| Super calendaring | A machine procedure that produces a very smooth paper surface that is exceptional for printing. |
| Synthetic papers | Any non-wood or cloth paper, usually petroleum (plastic) based. |
| T | |
| Text Paper | A high quality light weight printing paper. |
| Thermography | A printing process whereby slow drying ink is applied to paper and, while the ink is still wet, is lightly dusted with a resinous powder. The paper then passes through a heat chamber where the powder melts and fuses with the ink to produce a raised surface. |
| Tint | A halftone screen that contains all the same sized dots. |
| Trapping | The overlapping of one color over a different, adjacent color to ensure that no white space is visible where the two colors meet, especially when there are slight variations in the registration of the two colors during the printing process. Or the process of printing wet ink over wet or dry previously printed ink. |
| Trim marks | Marks placed on the printed sheet to indicate where cuts should be made. |
| > U | |
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Berkeley, CA 94710
tel 510-654-4545
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info@autumnpress.com
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2071 Mission Street
San Francisco
CA 94110
tel 415-824-2222
