How much do you know about commonly used technical terms in printing? (1)
Printing refers to the technology of transferring the ink to the surface of paper, fabric, leather and other materials through plate making, ink application, pressurization and other processes to reproduce the contents of the original manuscript in batches.
In a broad sense, printing includes pre-press, printing, post-press and various processes and processes related to graphic and text reproduction. It has a series of complex production processes and standards, and has a large number of professional terms.
Common Prepress Terminology
| noun terms | name explanation |
bleeding | For some patterns that need to go beyond the edge of the paper, it is necessary to exceed the cutting line by 3mm during plate making, and the deviation of cutting is reserved. This excess part is called "bleeding". |
Leakage | During the printing or cardboard process, when multiple colors are overprinted, due to non-standard positions, white edges are exposed between connected colors. |
Trapping/Trapping | Trapping is also called trapping, also known as scaling, mainly to make up for the gap between two adjacent different colors caused by inaccurate printing overprint. When people face printed matter, they always feel that the dark color is closer to the human eye, while the light color is far away from the human eye. The dark color above remains unchanged to ensure that it does not affect the visual effect. |
hit white | Photoplate making in the era of hanging nets. In order to remedy the lack of sensitivity in the dark parts of the pictures on the Internet, you can remove the original and flash it once or put a piece of paper to make up the exposure, or directly use the flash light to flash white light to increase the depth of the original and soften the image. |
| white | Text or lines are printed in shades, revealing the whiteness of the paper. Usually, the function of highlighting is used to make the graphics and text not fill in any color, and express it in a contrasting way. |
| fattening | Manual registration adds a transparent thick film to the photosensitive film to expose and increase weight. |
| field | The color block area without dots usually refers to the full version. |
hit the net | In the case of overprinting at certain screen angles, this texture can still be visually acceptable under fine line screening conditions. However, in the case of overprinting at other screen angles, it will conflict with other colors, and will produce very ugly large screen patterns. This phenomenon is printing bumping into the screen, which is commonly known as screen printing. This pattern is called moiré or moiré. |
flying net | The hanging net process of lens plate making, the hanging net is removed after normal exposure, and the short exposure is added to increase the contrast. |
| rose point | The sika deer-spotted net pattern presented in the printed matter pattern. |
dog teeth | A dog's teeth are uneven. There are not enough pixels in the picture, and the edges appear dog-toothed after zooming in. |
all together | For page ranking instructions, the initials are used as the baseline. Extending to imposition and bookbinding refers to taking the position of the foreground as the benchmark. |
Scattered tail | A type of typography. Only uniform kerning is required, not neat text at the end of the line. |
imposition | The process of collaging the designed single page or printing layout into a printing layout according to the size of the printing machine, paper size, printing, binding method, etc. |
color separation | Refers to the process of decomposing a color image original into monochrome versions. |
spot color | Spot color refers to a pre-mixed specific color ink (or special pre-mixed ink). Used to replace or supplement process color (CMYK) inks. Such as bright orange, green, fluorescent color, metallic gold and silver ink, etc., or it can be bronzing plate, embossed plate, etc., and can also be used as a partial varnish plate, etc. It is not produced by mixing CMYK four colors. Each spot color requires a special printing plate when it is printed (it can be simply understood as a spot color film, and the spot color is printed separately when printing). Spot color means accurate color . |
| monochrome | Refers to one of the four printing colors of CMYK. |
| cutting line | Lines printed around the paper to indicate where to cut. |
Overprint | One color patch is printed on top of another, and attention needs to be paid to the overprinting of pure black text on a color image. |
| format | Refers to the size of the format of the book, that is, how many pages are cut into a full-open printing paper. |
Overprint | When printing more than two colors, the pictures and texts of each color separation plate can achieve and maintain accurate registration. |
| Misregistration | In the process of color printing, the error of printing overlap. |
| P（page） | Refers to the number of pages of a printed matter, regardless of size |
PS version | "PS version" is the abbreviation of "Presensitized Plate". The diazo photosensitive film is hardened by light and remains on the plate. The diazo photosensitive film of the non-graphic part cannot see light, does not harden, and is dissolved and removed by the developer. The photodecomposition type uses the original positive plate for printing, and the non-graphic Part of the diazo compound is decomposed when exposed to light, and is dissolved and removed by the developer, and what remains on the plate is still the diazo compound that has not seen light. |
The terms in the above table are professional terms before printing, which are suitable for various printing such as packaging boxes and metal boxes.