Adobe Photoshop CS3 - Manual (Page 510)

PHOTOSHOP CS3
User Guide
503
Note: The Solidity and color choice options affect only the on-screen preview and the composite print. They have no effect
on the printed separations.
See also
“Choose a spot color” on page 123
Convert an alpha channel to a spot channel
1 Do one of the following:
• Double-click the alpha channel thumbnail in the Channels palette.
• Select the alpha channel in the Channels palette, and choose Channel Options from the palette menu.
2 Select Spot Color.
3 Click the color box, then choose a color in the Color Picker or click Color Libraries and choose a custom color.
Click OK.
4 Rename the channel if needed.
5 Click OK.
The areas of the channel containing grayscale values are converted to spot color.
6 To apply the color to the selected area of the channel, choose Image > Adjustments > Invert.
See also
“Create a new spot channel” on page 502
Edit a spot channel to add or remove color
1 Select the spot channel in the Channels palette.
2 Use a painting or editing tool to paint in the image. Paint with black to add more spot color at 100% opacity; paint
with gray to add spot color with lower opacity.
Note: Unlike the Solidity option in the Spot Channel Options dialog box, the Opacity option in the painting or editing
tool’s options determines the actual density of ink used in the printed output.
Change a spot channel’s color or solidity
1 Double-click the spot channel thumbnail in the Channels palette.
2 Click the color box, and choose a color. Click Color Libraries to choose from a custom color system such as
PANTONE or TOYO.
3 Enter a Solidity value between 0% and 100% to adjust ink opacity for the spot color.
See also
“Create a new spot channel” on page 502
“Choose a spot color” on page 123