Black build change to 100 Black 1

[dmacster]

Having trouble with receiving files where the black is printing on all plates rather than just the black plate. Is there a relatively simple way to fix the channels for this?

Thanks,
Donna

 

[apepp]

...is this specific to images with many tones of black e.g. a photograph, or to images with solid areas e.g. lineart and text, solid shapes etc.

...if they are often photographs or images with continuous tone you might want to consider converting to greyscale mode, there are other methods to achieve a grey image with more control such as using the channel mixer or a hue and saturation layer...

...Russell Brown from Adobe has some methods viewable here:

http://av.adobe.com/russellbrown/BlackWhiteVariationsSM.mov

...if you refer to images with solid areas, you can either do the same and convert to greyscale mode or go a step further and make it a bitmap...

...a good tip on rough edge images or low res black and white cmyk artwork is to resample the image to 600dpi (then with a cmyk convert to greyscale) . Add a small amount of gaussian blur to feather the edges very slightly to help smooth things out a bit. Then convert to bitmap mode with the 50% threshold option active...

Andrew

 

[dmacster]

Thanks, Andrew. It was actually the text only that needed to be 100% - so I used the magic wand with a low tolerance, non-contiguous - then deleted the selectionfrom the Cyan, Magenta and Yellow channels and used levels on Black only to bump to 100%. Worked great.

Thanks,
donna