Transparency on top of Pantone spot colors does not export correctly
When I export a design that has an element with transparency on top of a Pantone solid, the element with transparency disappears in the output PDF.
I tried different PDF settings but all have the same result. Changing the filetype of the element with transparency (PSD, PNG, PDF, …) does not change the result.
I found that, when converting the Pantone solid to Lab or CMYK, the element with transparency appears again. But this workaround also means that I cannot use the Pantone library.
Is this a bug, or am I doing something wrong?
Alvin Manning commented
Well, it's certainly not a feature, but in real-world printing you can't do transparency with pantones either. Still, you would think InDesign would just convert the pantone to the selected colorspace before outputing.