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Rolf
07-22-2009, 05:32 AM
Attached are the prints of the same RGB-picture printed on both of our machines using the same job-settings and profiles.

On DC250 there a mistakes in the image until we disable "RGB: use K for grey" for images. On 700DCP the print is ok without disabling this setting.

Why these differences? Bug?

Brian_S
07-22-2009, 10:14 AM
Hello Rolf,
This is expected behavior. We realized there was a problem when objects (typically images) contain color and K only data when Preserve Black for RGB and even CMYK is ON. The problem is typically seen when a blend of colors transitions to or through the neutral axis causing a quick rich to pure black "step". The result was a sharp change in density which is very noticeable.

So the feature has been improved to do object level detection. Any object containing color info will be ignored by this feature. This is what you are seeing on the 700.

Hope this is helpfull.
thanks,
...meier


Attached are the prints of the same RGB-picture printed on both of our machines using the same job-settings and profiles.

On DC250 there a mistakes in the image until we disable "RGB: use K for grey" for images. On 700DCP the print is ok without disabling this setting.

Why these differences? Bug?

Rolf
07-23-2009, 11:39 PM
Is this improvement also planned to integrate into the rip of the DC250?