I was trying to make a white design on black tissue paper, but it won’t show any white elements. It just looks solid black.
As a workaround, I can use the white tissue paper and make its background black and then add the white design. I imagine the backside of the tissue paper will still be white though.
The printing process for tissue paper doesn’t offer a white under print - so indeed, anything printed on black (or any of the other colors for that matter) will not include any white areas - they will always be the color of the paper.