[John Good]

hello,

I have a light blue, and a light yellow.
I'd like to have a precise idea of the green it makes when they are overprinted.

Is that possible before printing ?

[d*d]

what application are you using?

[John Good]

illustrator / inDesign
layer opacity > multiply

I just can see whan happens on my screen, I'd like to see something I can trust.

[d*d]

there is an overprint preview in illustrator which is better than using multiply

[John Good]

Yes, I just couldn't get it working.
Activating / deactivation overprint preview has no effect.

what's the trick ?

[steveb]

I'd stick my neck out and say NO! Greens especially are notorious for not looking anything like you think they'll turn out.

Do your overprint thingy onscreen and turn the result into CMYK. Then measure the colour values, e.g. C20 M0 Y27 K0. Then get hold of a printer's colour guide which has thousands of colour squares with all variations from 0 0 0 0 to 100 100 100 100. You'll be able to check at least whether your overprint is going to be near what you want.

I've found that even checking like that, it's difficult to evaluate visually the shade because of the small size of the square,

[John Good]

I was expecting to have exactely NOT that answer...

[d*d]

Originally Posted by John Good

Yes, I just couldn't get it working.
Activating / deactivation overprint preview has no effect.

what's the trick ?

for the objects you want to overprint choose attributes and tick 'overprint fill' and/or overprint fill

[John Good]

thanks.

hope it looks better on paper