With the conventional method of paste making, color matching is necessary upon every client's request and for every print design. An extensive range of dyes has to be secured. And with the rise of 'small-lot+ multiple-design' production, the rate of waste has increased in the process of conventional color matching.

The solution can be found in a reduction in the number of dyes.

There will be no problem if multiple shades can be created to match exactly each design for product planning. To explain the OCS more specifically, base colors, which play the central role in color matching, are selected to begin with.

This forms the base in the OCS. The OCS does not set its base on trichromatic colors.

As shown in Fig.-1 in the previous page, colors such as brown, olive and gray are boldly selected as base-colors.

With brown as a base, orange brown can easily be created as it is a combination of orange and brown by the specific ratio indicated in Fig.-1. If more orange expression is needed, an indication of orange-brown combination in the ratio of 80-20 can easily be found in the color distribution chart.

With dye combination ratios obtained by such a method, more than 1,000 colors can be created based on 2 disperse dyes.

The advantages of this method are enormous. It facilitates manual color matching, and the use of a color kitchen system will inhibit color deviation made by manual procedures. The number of dye tanks can be reduced.

To take brown as an example, the basic shade shown in the center of the circle is not the only brown available.

There are yellowish browns as well as reddish shades. Let us look at Fig.-1. Brown becomes olive brown, in the overlapped part with basic olive.

Olive and gray becomes olive-gray, and gray and brown gray-brown when overlapped.