Adobe Illustrator CS3 Instrukcja Użytkownika Pobierz pdf (Strona 421)

ILLUSTRATOR CS3

User Guide

415

• Use lighter colors, or make dark blends short. Banding is most likely to occur between very dark colors and white.

• Use an appropriate line screen that retains 256 levels of gray.

• If you create a gradient between two or more spot colors, assign different screen angles to the spot colors when

you create color separations. If you’re not sure what the angles should be, consult your print shop.

• Print to an output device that supports PostScript® Language Level 3 whenever possible.

• If you have to print to an output device that supports Postscript Language Level 2, or when printing meshes that

include transparency, you can choose to rasterize gradients and meshes during printing. As a result, Illustrator

converts gradients and meshes from vector objects to JPEG images.

Rasterize gradients and meshes during printing

1 Choose File > Print.

2 Select Graphics on the left side of the Print dialog box, and select Compatible Gradient And Gradient Mesh

Printing.

Important: The Compatible Gradient And Gradient Mesh Printing option can slow printing on printers that don’t have

problems with gradients, so only select this option if you experience printing problems.

Setting the proper screen frequency for printing gradients, meshes, and blends

When printing your file, you may find that the resolution of your printer, when combined with the chosen screen

frequency, allows fewer than 256 levels of gray. A higher screen frequency decreases the levels of gray available to the

printer. For example, if you are printing at a resolution of 2400 dpi, using a line screen higher than 150 results in fewer

than 256 levels of gray. The following table lists the maximum line-screen setting you can use with printers to

maintain all 256 levels of gray:

Final Imagesetter Resolution Maximum Line Screen

to Use

300 19

400 25

600 38

900 56

1000 63

1270 79

1446 90

1524 95

1693 106

2000 125

2400 150

2540 159

3000 188

1 2 ... 416 417 418 419 420 421 422 423 424 425 426 ... 494 495

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Adobe Illustrator CS3 Instrukcja Użytkownika Strona 421