It's not really clear from your screenshot or your description as to what the issue is?
Can you post images of what it is supposed to look like compared to what it does look like?
If you look really hard, you can see that the black stroke around the edge of the whiote sahpe is darker onthe outside half than the inside. This is probably due to a combination of using the default black which is set to overprint and the alignement of the stroke to centered, which puts if half over the white and half over the yellow area, and the overprint onthe yellow is darkening that half of the stroke.
There are two ways to fix this. Either change the stroke alignment so it aligned to inside or outside instead of centered, or make a copy of the [Black] swatch, name it Knockout Black to keep clear what it does and use that instead.
Note that on a press there will always be some trapping along the edge that will also creat this effect, but it will be essentially unnoticeable on a wide stroke.
I'd probably make a rich black then.
Make the black stroke the same colour as the yellow underneath - then bump up the black to 100%
That approach requires a special color for each background. Changing the stroke alignment works universally with the default, and a knockout would allow a unifrom color over varying background.
It would give a better result though - in my opinion.
There is no difference whatever between overprinting [Black] on yellow and mixing 100 k with the same yellow as a rich black.
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But you said
Peter Spier wrote:
Changing the stroke alignment works universally with the default, and a knockout would allow a unifrom color over varying background
Maybe we're getting our wires crossed?
But an overprint of Black would have uneven shades of black over varying background patterns.
Mixing a rich black ink would prevent this...
And it's a simple colour swap if they use Mixed Ink swatches.
Sorry. Soon as I wrote that I knew it wind up confusing somebody.
I mentioned two options originally -- change the stroke alignment (and presumably keep the default [Black] color, OR use a knockout copy of the black swatch. For what it's worth, the screen shot looks to me like the background stripes are 100 K.
You could certainly create a rich black color and use it for the stroke, in which case it would knock out as well, and alignment would be moot, but I would use something more generic than just the yellow and black. Hard to know, too, i f there are spot colors involved here, and if there are that might have a big impact on the technique chosen.
And as far as the overprint being uneven, that's true, IF the background is uneven. In the example shown there is only yellow behind it...
Hi Peter, thanks to both yourself and Eugene - the discussion you had not only solved the problem but also contextualised it as well - many thanks for a junior designer David
Hi Eugene, thanks to both yourself and Peter - the discussion you had not only solved the problem but also contextualised it as well - many thanks for a junior designer David
Yeah, as obtuse as these little side discussions can get sometimes, they usually bring out the subtleties in the various options available and help you decide waht will work best in your own real-world situation. There's almost never a single 'right' choice that fits all possibilities.