On Tuesday, August 23, 2005, at 10:42 AM, Tyler Boley wrote:
> --- In QuadtoneRIP@yahoogroups.com, Ernst Dinkla <E.Dinkla@c...> wrote:
> ...
>> I've used a quad setup on the 9000 that had the Eboni black + the
> middle
>> grey ink in the Mm channels and was linearised like that and in the Cc
>> channels, the darkest grey + lightest grey ink in Mm and linearised
> like
>> that again. Some partitioning was laid on top of that, (the highlights
>> were done by the lightest range only, mixing of the two ranges was of
>> course mainly in the mid ranges, 2% of the darkest grey went up with
> the
>> black) trying to get as close to native linearisation and an overall
>> linearisation etc added afterwards. Wasatch SoftRip. That's a simple
>> example of what I propose....
>
> I think I see what you are doing. Similar setups could be put together
> with some creativity with SP, but the main tool allowing your idea is
> the QTR blending (I think?).
> But I wonder- given the large amount of overlap that must occur with 7
> inks (which Roy also mentiones) the K7s with QTR may be doing
> something actually similar.
> Am I wrong in deducing that a main advantge of your idea is making use
> of as many nozzles as possible, and the resulting complex weave?
> Tyler
>
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.
UltraChrome 2 grays -- Black and Light-Black
0 0% |
5 2% | k
10 4% | k
15 6% | k
20 8% | k
25 10% | k
30 12% | k
35 14% | k
40 16% | k
45 18% | k
50 20% | k
55 22% | k
60 24% | k
65 25% | k
70 27% | k
75 29% | k
80 31% | k
85 33% | k
90 35% | k
95 37% | k
100 39% | k
105 41% | k
110 43% | k
115 45% | k
120 47% | k
125 49% | k
130 51% | k
135 53% | k
140 55% | k
145 57% | k
150 59% | k
155 61% |K k
160 63% | K k
165 65% | K k
170 67% | K k
175 69% | K k
180 71% | K k
185 73% | K k
190 75% | K k
195 76% | K k
200 78% | K k
205 80% | K k
210 82% | K k
215 84% | K k
220 86% | K k
225 88% | K k
230 90% | k
235 92% | k K
240 94% | k K
245 96% | k K
250 98% | k
K
255 100% |
K
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
Finally the K7 system:
0 0% |
5 2% | Y
10 4% |m Y
15 6% | m Y
20 8% | m Y
25 10% | m Y
30 12% | m Y
35 14% | m Y
40 16% | Y m
45 18% | M Y m
50 20% | M Y m
55 22% | Y M
m
60 24% | Y M
m
65 25% | M m
70 27% | M m
75 29% | m M
80 31% |c m M
85 33% | c m M
90 35% | c m M
95 37% | c m
M
100 39% | cm
M
105 41% | m c
M
110 43% | m c
M
115 45% | c
M
120 47% | c M
125 49% | c M
130 51% | c M
135 53% | M c
140 55% | M c
145 57% | C M c
150 59% | C M c
155 61% | C M c
160 63% | CM
c
165 65% | M C
c
170 67% | C
c
175 69% | C c
180 71% | C c
185 73% | c C
190 75% |k c C
195 76% | k c
C
200 78% | kc
C
205 80% | c k
C
210 82% | k C
215 84% | k C
220 86% | C k
225 88% | K C
k
230 90% | K C
k
235 92% | CK
k
240 94% | C K
k
245 96% | K
k
250 98% | kK
255 100% | k
K
Roy
-
Roy Harrington
roy@...
Black & White Photo Gallery
http://www.harrington.comMessage
Re: [QuadtoneRIP] Re: QTR 51-step linearisation2
2005-08-23 by Roy Harrington