To print object on all plates, including spot color plates, you can apply the registration color to the object.
Registration color consist of 100% of C, M, Y and K. It is also used for crop marks and trim marks.
If the registration color does not exist in your color list, add it.
1.Select the page objects (frames, boxes, rules) to which you want to apply registration color.
2.On the Area/Image Colors palette, select the registration color.