I am teaching a class of 25 students who are just learning InDesign. About half of them decided to put a black to white gradient as their background and then they put text over that. The text has effects applied and when these students print, the gradient prints as a shade of brown AND the "box" the original shape was in shows up as a black box. This only seems to be happening if they've applied an effect to the text [like an inner glow, etc.
How do we "turn off" that black box that shouldn't be there.
Very frustrated teacher and students...
When you print out of InDesign transparency has to get flattened, so the Transparency Flattener preset you choose in the Print dialog's Advanced tab can have an effect on output. Try using the High Resolution preset and if that doesn't work make a preset with Raster/Vector Balance set to 0:
If the Black in the gradient is set as CMYK 0|0|0|100, set your Appearance of Blacks Preference to Output All Blacks as Rich Blacks