(Mac Pro 4,1 / 2.66 GHz Quad/12G InDesign: CS6 / Ver. 8.0.2)
I have 2 boxes filled with paper and Inner shadow effect with black (created in InDesign), Background is a 4 color linear gradient (left is 4c green, middle is paper, right 4c green) from Illustrator.
The Inner shadow box that is close to the top of gradient (more green than white) is ok.
The Inner shadow box that sits on the paper fill of the gradient, appears to be overprinting, thus no paper fill.
I have check fills of the Inner shadow box in InDesign, to make sure it is not overprinting.
I have tried some tricks but nothing works.
Instead of using the default Paper swatch, create your own swatch with 0 0 0 0 values and see if that makes any difference.
Thank you, I tried both suggestions in Illustrator and InDesign no improvement.
I found the solution:
You should never use white as a color in a gradient. I have always been told to use 5-10% of the gradient color.
This gradient create in Illustrator using:
left is 4c green, middle is paper, right 4c green
Duplicated the green and made a spot
modified gradient to:
left 4c green, middle 8% of Spot green, right 4c green
Been a few years and I forgot prepress 101, white is not a color and should never be used in a gradient.
Hope this helps someone in the future.
Thank you Leonie15