How convert image with max contrast with only K? (Publisher K only not suitable). All apps and their v2.3 versions.

[MxHeppa]

How convert image max contrast with only K ? (Publisher K only not suitable). All apps and their v2.3 version. this publisher way is not proper greyscale conversion but takes only K chanel of image. and greyscale material still needd be in cmyk colour model this usage but without CMY inks.

[MxHeppa]

or black white image way end result is cmyk profile but only K chanel.

 

[thomaso]

If you want a document with a black channel only you can convert its document colour space to Grayscale.

If wanted you can first define the resulting grays for various colour ranges individually with a Black & White Adjustment.

.

[MxHeppa]

Few companies want material in speffic colour profile even black white materil but ways there is no data in cmy channels.

[NotMyFault]

Using the channels mixer adjustment you can suppress or zero out all CMY channels, and add or subtract them in defined weighting factors to K channel. Is there anything you miss?

[MxHeppa]

5 hours ago, NotMyFault said:

Using the channels mixer adjustment you can suppress or zero out all CMY channels, and add or subtract them in defined weighting factors to K channel. Is there anything you miss?

this way i cannot do SRGB image direclty K image (in speffic CMYK what name i dont remember but i found info easily). but my technique works. converting rgb to cmyk and do after it cmyk is not wise i feel becouse there is two times cutted colours then i feel is good do speffic greyscale conversion in rgb side. first conversing reduces colours. other usage likely newer happen but other likely if i use one company make black and white books.(they want material speffic cmyk profile in only k chanel to do black white books exact same profile what used cmyk projects but difference is this)