When designing for a standard priced CD booklet, one full side (outside) will be quoted out as color while the other side (inside) is black and white or grayscale.
- 4 over 1 booklet
- 4 over 1 traycard
You can pay extra to get color on all sides of your booklet, but for this section of the tutorial we will assume you need standard B&W artwork or grayscale images for the inside of the folder. This standard configuration is called 4 over 1 printing. 4 being the CMYK color and 1 being grayscale using black ink.
Grayscale Definition:
RGB Grayscale mode uses up to 256 shades of gray. Every pixel of an RGB Photoshop grayscale image has a brightness value ranging from 0 (black) to 255 (white). Grayscale values for printing CMYK CDs and Booklets will be measured as percentages of black ink coverage (0% is equal to white, 100% to black). Gray spot colors are available with such names as "cool gray" so be aware that these still constitute a "spot color" which costs extra if used on any paper parts.
- Any image can be converted to grayscale. (Provided it opens in Photoshop)
- To convert a color image to a high-quality grayscale image, Photoshop discards all color information in the original image. The gray levels (shades) of the converted pixels represent the luminosity of the original pixels.
- You can mix information from the color channels to create a custom grayscale channel by using the Channel Mixer command.
What about stapled booklets?
Just like folders, booklets are also classified as 4 over 1 or 4 over 4. The outermost covers, say pages 1 and 8 on an 8 page stapled booklet would typically be colored while all inside pages, 2 through 7, would be B&W or grayscale.
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