between the number and choice of pre diluted standard colorant concentration pairs if any and the number and choice of neutral colors should be made with the demands of the specific patterns and pattern colors to be reproduced in mind as a specific example of the above technique involving use of different dilutions of the same hue e g pink and red or light and medium blue it is contemplated that a particularly wide range of commercially desirable colors can be produced from a set of five colors that includes standard dilutions of blue and cyan along with red gray and yellow with the latter three colors all at the same relative but not necessarily standard level of dilution the process is begun by using relatively dilute colorant concentrations of these latter three colors after producing all patterns having colors best suited to combinations of these five process colors these three colorants can be purged from the patterning device simply by respectively introducing all at one time progressively less dilute colorant concentrations of these three colorants e g more concentrated red medium gray and more concentrated yellow to the respective applicators that previously contained the more dilute concentration of the same colorant because of the ability of darker or more concentrated.