I have very simple sample code that creates a small table of LAB values that I want to export as PDF. After opening in Acrobat, I'm using PitStop Pro to interrogate the image. PitStop confirms it's an RGB image, not a Lab image. I'm I doing something wrong, or does Mathematica 10.3 only export to Device color spaces?
Image[{{{25, 0, -5}, {25, 0, -4}, {25, 0, -3}, {25, 0, -2}, {25,
0, -1}, {25, 0, 0}, {25, 0, 1} {25, 0, 2}, {25, 0, 3}, {25, 0,
4}, {25, 0, 5}}}, "Byte", ColorSpace -> "LAB"]
Export["TestLABPDF001.pdf", %]