|Black & White||Platinum Tone|
Did you ever see a toned image on the web and wonder how they did it? Here's a simple procedure you can use to copy a tone from any picture and apply it to your own image.
For demonstration purposes I'll use the winter scene from Yellowstone. First setup the following layers:
When done you should have the following layers in the new document.
Now toggle the top two layers off so only the B&W image shows. Choose the Color Sampler tool (it's under the Eyedropper), and specify Point Sample. Zoom-in so you can see individual pixels and lay down points at densities of approximately 64, 128, and 192. Check the Info palette for values and use the Space Bar to navigate. Record the exact grayscale value at each point.
Now enable the top color layer and record the RGB values at each point. The results for this image are summarized in the following table.
B&W Value 64 128 192 Red 64/71 128/129 192/194 Green 64/62 128/128 192/193 Blue 64/53 128/117 192/182
For a grayscale value of 64 the toned image had a value of 71 in the red channel. In other words you need to transform the value from 64 to 71.
Repeat each of the settings for all three channels. You'll find it convenient to use shortcut key Ctrl-Tab to navigate between points in the Curves dialog box. When done check your results by toggling the top color layer on and off.
Save the results with the Save button in the Curves dialog box. Next time you want to apply this tone to a color image, convert the image from RGB to Grayscale to eliminate color (Image > Mode > Grayscale), convert it back to RGB again, and load the toning curve from the Curves dialog box.
To make a duotone convert the image to grayscale (Image > Mode > Grayscale), then convert it to a duotone (Image > Mode > Duotone). At this point you can decide whether you want a duotone, tritone, or quadtone. Choose Pantone inks for each tone, and adjust the Curve to apply the amount of ink applied to shadows and highlights.
Wait a minute! Does your printer have Pantone inks? Probably not. Pantone inks are used by the press for publishing high-quality books. So, if your printer doesn't have Pantone inks, then you can get the same effect using standard Curves.
The procedure to copy tones, described above, can be used to copy a tone from an image created with duotones. In fact the experience you gain copying tones, and examining the curves involved, will serve you well. For example, brown tones are often accomplished by increasing the contribution red and decreasing the contribution of blue. Armed with this knowledge you can make your own duotones using the Curves dialog. I often make my toning curves extra-strength, then reduce opacity to suit the image.