 |
Four Color Process
Unlike many print shops, we have the ability to print four-color
process for producing full color photographs or graphic images. Our specialty in this field is that we will give you a top quality product in the
quantities you need no matter how small. Four-color process can help to give your company an image you can be proud of. In today's competitive marketplace, you need to project the best image you can.
And colorful marketing materials can give you that extra edge.
Four color process is based on the theory of three color sight. White light, which contains all visible light, has three main colors: red, green,
and blue. These three colors are called additive primaries because these three colors, when added together, produce white light. The process of color separation is similar to the process of seeing by the
eye. The original artwork is photographed using three filters, each corresponding to one of these primaries. A red filter over the lens produces a negative of all the red light of the subject. When a positive
print is made, you will be left with blue and green areas. The negative has subtracted the red light from the scene and left you with cyan. A green filter produces a positive of the other colors, red and blue,
leaving you with magenta. A blue filter leaves red and green which produce a yellow positive. Cyan, magenta, and yellow are subtractive primaries because each represents two additive primaries after one
has been subtracted from white light. These are the colors used for process color printing. When these three colors are combined , the result should be a reasonable reproduction of the original. It is not. The
colors are flat. This is not due to a flaw, but due to the pigmentation of the inks. A fourth color, black, is added to the mix to overcome this, improving the depth. A
halftone
, or screened image is created for each color. Each of these images is printed on the press in succession to create a complete, full color image.
|
 |
|
