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361
Adobe Illustrator Help
Producing Color Separations
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If your imagesetter can accommodate the longest side of your imageable area, you can
conserve a considerable amount of film or paper by using Transverse in conjunction with
Offset. Compare the following examples of an image printed by Adobe Illustrator with
Transverse on and off.
Transverse off and film saved with Transverse on
A.
Offset value
B.
Film saved
When both Offset and Transverse are selected, Offset controls the amount of space
between the separations.
Specifying the emulsion
Emulsion
refers to the photosensitive layer on a piece of film or paper.
Up (Right Reading)
means that type in the image is readable (that is, “right reading”) when the photosensitive
layer is facing you.
Down (Right Reading)
means that type is readable when the photo
sensitive layer is facing away from you. Normally, images printed on paper are printed Up
(Right Reading), whereas images printed on film are often printed Down (Right Reading).
Check with your print shop to determine which emulsion direction it prefers.
To tell whether you are looking at the emulsion side or the nonemulsion side (also referred
to as the
base
), examine the final film under bright light. One side appears shinier than the
other. The dull side is the emulsion side; the shiny side is the base.
To specify the emulsion:
1
In the Separation Setup dialog box, choose Up (Right Reading) or Down (Right Reading)
from the Emulsion pop-up menu. The image flips.
2
Specify another separation option, or click OK.
Specifying the image type
The image options determine the image exposure: negative or positive. Typically, print
shops require negative film in the United States and positive film in Europe and Japan.
If you are unsure about which image type to use, consult your print shop.
To specify the image type:
1
In the Separation Setup dialog box, choose Positive or Negative from the Image
pop-up menu.
2
Specify another separation option, or click OK.
A
A
B
