QTR-Quadtone RIP

Roy Harrington wrote:

>
>Here's a couple of examples of what partitioning looks like for 2, 4, 
>and 7 grays.
>They are crude text graphs but show that at all times there are 2 or 3 
>inks being used.
>Down the page are the K percents,  across is amount of each ink used.
>  
>

For the K7 it has even more mixing than I expected.

What is the overlap number you use to get the quad result below and for 
which printer was it used ?

Ernst

>A quad system:
>
>   0   0%  |
>   5   2%  | Y
>  10   4%  |  Y
>  15   6%  |    Y
>  20   8%  |     Y
>  25  10%  |       Y
>  30  12%  |        Y
>  35  14%  |          Y
>  40  16%  |            Y
>  45  18%  |              Y
>  50  20%  |                 Y
>  55  22%  |                   Y
>  60  24%  |                      Y
>  65  25%  |                         Y
>  70  27%  |                             Y
>  75  29%  |M                               Y
>  80  31%  |M                                   Y
>  85  33%  | M                                     Y
>  90  35%  | M                                       Y
>  95  37%  |   M                                      Y
>100  39%  |    M                                     Y
>105  41%  |      M                                   Y
>110  43%  |         M                                Y
>115  45%  |           M                             Y
>120  47%  |               M                       Y
>125  49%  |                    M               Y
>130  51%  |                           M  Y
>135  53%  |                      Y             M
>140  55%  |C               Y                        M
>145  57%  | C            Y                           M
>150  59%  |  C         Y                               M
>155  61%  |   C      Y                                  M
>160  63%  |   C    Y                                     M
>165  65%  |     CY                                         M
>170  67%  |   Y  C                                          M
>175  69%  |Y       C                                         M
>180  71%  |           C                                   M
>185  73%  |              C                            M
>190  75%  |                  C                     M
>195  76%  |                   C                   M
>200  78%  |                       C           M
>205  80%  |                        M         C
>210  82%  |                   M                   C
>215  84%  | K          M                                C
>220  86%  |   K    M                                      C
>225  88%  |    KM                                          C
>230  90%  |  M   K                                           C
>235  92%  |            K                                C
>240  94%  |                  K                    C
>245  96%  |                            K C
>250  98%  |        C                                                K
>255 100%  |   C                                                         
>          K
>
>  
>