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Hi,
If someone could help me out or point me to reference material (or a forum topic I couldn’t find) I’d be very grateful.
If I have a cmyk tiff with an embedded cmyk profile and I run it to press or film, can I expect a 20% area in the file to show in the film/output as a 20% stipple – or will the embedded cmyk profile change the values or an already separated image?
If so, does this mean in the ripping process, the image is ‘re-separated’ as instructed by the profile.
I have run into an issue with a printer where a file (cmyk tiff) was run by them twice – once supplied with a generic euro cmyk profile embedded and once without. The colour numbers / channel values were identical.
My impression was the working space colour separation is consulted (and stored as a profile) to converted the image from rgb to cmyk. Once the file is separated, the colour numbers are set in stone unless you apply a transfer function.
The documentation seems to say ‘profiling makes everything nice’ and doesn’t cover the nitty gitty of how the cmyk image data is affected.
Thanks
James
If someone could help me out or point me to reference material (or a forum topic I couldn’t find) I’d be very grateful.
If I have a cmyk tiff with an embedded cmyk profile and I run it to press or film, can I expect a 20% area in the file to show in the film/output as a 20% stipple – or will the embedded cmyk profile change the values or an already separated image?
If so, does this mean in the ripping process, the image is ‘re-separated’ as instructed by the profile.
I have run into an issue with a printer where a file (cmyk tiff) was run by them twice – once supplied with a generic euro cmyk profile embedded and once without. The colour numbers / channel values were identical.
My impression was the working space colour separation is consulted (and stored as a profile) to converted the image from rgb to cmyk. Once the file is separated, the colour numbers are set in stone unless you apply a transfer function.
The documentation seems to say ‘profiling makes everything nice’ and doesn’t cover the nitty gitty of how the cmyk image data is affected.
Thanks
James
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