Epson 400 Manuel d'utilisateur télécharger pdf (Page 123)

Process of color printing

A printer produces color images by printing tiny patterns of ink dots

using CMYK colors as mentioned in the previous section. Because most

ink jet printers are not able to print different gradations of the three

primary colors, they must use a halftoning method in order to represent

millions of colors or the gradation of colors as follows:

Dithering and error diffusion are the most commonly used halftoning

methods.

Dithering

Dithering uniformly aligns individual dots of different colored inks to

create the appearance of natural colors. This method is suitable for

printing documents that contain large areas of solid color, such as bar

charts and graphs.

Error diffusion

Error diffusion blends individual colored dots with the colors of the

surrounding dots to create the appearance of natural colors. By blending

colored dots, the printer can achieve excellent colors and subtle color

gradation. This method is best suited for printing documents that contain

finely detailed graphics or photographic images.

4-4

Hawaii2 Ref.

Rev.b

A5 size Appendix A

06-02-97 DR, pass 0

A-4

Tips for Color Printing

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Epson 400 Manuel d'utilisateur Page 123