Little Printing Facts You Shouldn't Miss
Release time:
2024-08-23
What are the main categories of printing? Typically, they include offset printing, flexographic printing, screen printing, and gravure printing.
1. What are the main types of printing? Typically, they include offset printing, flexographic printing, screen printing, and gravure printing.
2. What are “Dadu paper,” “Zhengdu paper,” and “TeGui paper”? Dadu paper refers to paper with dimensions of 1194×889, while Zhengdu paper measures 1092×787. TeGui paper refers to paper of special specifications. Typically, paper mills cut paper into Dadu or Zhengdu sizes, or into custom sizes according to customer requirements.
In addition, after trimming, the standard oversize for printing is typically 1190×880, while the standard finished size is 1090×780. If there’s a design error or if the layout has special requirements, you must notify the printing factory in advance; otherwise, the print will be produced according to the specified dimensions.
3. What are spot colors and what are the four process colors? A spot color refers to a specific, predefined color that is not created by mixing the four standard printing inks—Cyan, Magenta, Yellow, and Black—but rather is printed using a specially formulated ink designed for that particular color. Spot-color inks are either pre-mixed by the printing house or produced by ink manufacturers. For each spot color used in a print job, there is a dedicated separate printing plate. Using spot colors allows for more accurate color reproduction—for example, special gold or special silver tones. The four process colors refer to the CMYK color model used in printing.
4. What to do when encountering large areas of black: It’s best to place a color between 30 and 40—a shade of blue—underneath the large area of black, or alternatively, a similar dark shade in the 30-40 range. Theoretically speaking, black will overpower any color it’s printed over. The purpose is to prevent insufficient ink density and avoid the appearance of tiny white spots.
5. Resolution for printing: Typically 300 DPI. Of course, the higher the resolution, the sharper the image.
6. What is bleed? Actually, this is quite simple, yet many people still don’t understand what it means. The purpose of bleed is to ensure accurate die-cutting. For ordinary paper, the typical bleed is 3 mm; for corrugated cardboard, it’s generally 5–7 mm. Due to design or layout errors, the bleed can be slightly reduced, but it must always be at least 1.5 mm.
7. Minimum size for gold and silver hot stamping: Generally, the minimum size is 0.3 mm; with skilled techniques, it can be as low as 0.1 to 0.2 mm.
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