Bởi vì chất lượng mực in và giấy ảnh hưởng đến sản lượng máy in rất nhiều, bạn không thể điều chỉnh các cài đặt trên máy in để hiệu chỉnh sản lượng màu sắc. Thay vào đó, máy in sử dụng ICC profile được tạo ra bằng cách in một mẫu thử nghiệm với sản lượng được biết đến gamma, độ sáng, độ tương phản, và đầu ra màu sắc | Chapter 29 Printing and Color Management Because ink and paper quality affect printer output so much you cannot adjust the settings on a printer to calibrate color output. Instead printers use ICC profiles that are created by printing a test sample with known output gamma brightness contrast and color outputs. The sample test print is then analyzed by a photometer sometimes called a spectrophotometer to determine the actual output with known CYMK colors. Software that comes with the photometer then uses the difference between the two to create the ICC profile. Although the cost of the photometer and software is expensive you can typically find an ICC profile for your printer ink combination on the Internet for reasonable prices usually about 20- 30 . Using Color Management in Photoshop Now that we have discussed the theory of color profiles you are ready to configure and use the color management settings in Photoshop. The following sections discuss how to configure the color management settings in Photoshop assign color profiles to images and proof images using different color profiles. Configuring color settings in Photoshop The color settings in Photoshop are configured using the Color Settings utility shown in Figure . Launch the color settings dialog box by pressing Ctrl Shift K on the keyboard or selecting Edit C Color Settings from the main menu. At first appearance the dialog box may seem a bit unfamiliar and daunting. The next few sections discuss each of the options available in the Color Settings dialog box and hopefully dispel any apprehension of using them. Tip If you save your color settings as a preset file you can use that preset in Adobe Bridge s Suite Color Settings dialog box launched by pressing Ctrl Shift K in Bridge . Bridge s Suite Color Settings utility allows you to synchronize the color management profiles between Creative Suite applications. Settings The Settings menu option offers a list of preset color configurations that set the .
