| 摘要 |
PROBLEM TO BE SOLVED: To obtain a black adding method in dot printing without change before and after base color removal and black addition by previously obtaining the mix rate of three primary color-ink to be the same color as black ink. SOLUTION: The correspondence of a dot number Bk at the time of the solid printing of black ink with the dot number mix Fy, Fc and Fm of three primary ink, a cyanogen, a Mazenta and yellow is guided by a relational expression, Fy=a×Bk+b, Fc=c×Bk+d and Fm=e×Bk+f so as to generate a color being almost equal to the black color generated with the three primary colors by black ink. In the procedure of base color removal and black addition concerning the case of the dot number of yellow, the cyanogen and the Mazenta, the respective dot numbers in the three primary color-mixed color before adding black and the base color removing quantities UCR of respective kinds of three primary color-ink are obtained. Then, the ink dot numbers of three primary color ink after base color removal are calculated and, moreover, the dot number of black ink for adding black is calculated. |
