Adobe illustrator 10 Manuale Utente

Use shorter blends. The optimum length depends on the colors in your blend, but try to 

keep blends shorter than 7.5 inches. (See 

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. 

When the document contains complex artwork, transparencies, gradients, mesh 

objects, or blends, make sure that you have selected the right resolution and Quality/
Speed settings in the Document Setup dialog box. (See 

In printing your file, you may find that the resolution of your printer, when combined with 
the chosen line screen, 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 screens you can use with printers to maintain 
all 256 levels of gray:

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

3252

203

3600

225

4000

250