How to prevent white leakage before printing?
The most common trap techniques are Spread and Choke. Spread (commonly known as the "food") refers to the color version of outward expansion in the peripheral white trap overprint block yan. Choke (commonly known as "eat") and the concept of Spread instead, allow external color version inward extension trap. The use of two kinds of trapping techniques, all depending on color and light, the best is contained in the dark. Nothing is impossible in some cases, may be the result of Mixed trap line, Mixed refers to the white line trap is colored with two colors to meet color version produced by mixing color.
The most commonly used software (such as: PageMaker, QuarkXPress, Illustrator, FreeHand etc.) have built-in trap function, and the software can do some simple color and color to meet trap, as for the gradient colors and images are required to do trap work.
Trap first start from the computer, the most simple method in color when setting a border line, and choose to overprint border line (Overprint). Have a walk this line even when printing, will show the white line, there will only be a dark line. Trap work may seem simple, but if the color layout of multiple and complex, there will be mistakes in the. In the requirements of the guests, trapping white color is also a sophisticated problem, if blue with yellow plus line, line is green, this effect will affect the layout design, to achieve the trap and do not appear green line, resulting in a lot of trap skills.
