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PREPARING FILES FOR PRESS

If your intended output is a printing press, Acrobat offers a wide array of tools to make sure your final files print the way they should. These tools are grouped in the Print Production toolbar. Let's take a look at what each of these can do for you.

Trap Presets

Because of the way inks are applied when printing color in an offset preset and because of the elasticity of the paper stock used for print, sometimes a thin gap may appear between two areas of different colors. To avoid that from happening traps are applied. Traps are very thin lines of overlapping inks applied to those critical areas to prevent these gaps from appearing. To create a trap, normally the area of the lightest color is slightly expanded to fit under the area of darker color. Acrobat files can contain specific information that enables printers to generate traps automatically when sending a job to press. The default Trap Presets contain generic values for the automatic creation of traps for most cases, but sometimes a job requires these values to be changed. Acrobat gives you the flexibility not only to change these default values but also to save them as a recorded preset. If you have doubts about setting traps, consult with your printer or service bureau. Most printers prefer to do the trapping themselves, so most of the time you should not worry about trapping. However, if you are producing your own color separation films, these trap settings are available to you. Settings may vary depending on the particular characteristics of the paper and inks to be used (see Figure 44.6). The available settings are


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