> The thing is pretty simple in fact. When you export > into a "gray level" PDF, colors _are_ translated to fit into this particular > color space. And, as long as CMYK(0,0,0,100) isn?t the blackest black you can > obtain in CMYK color space, it?s obviously not mapped to the blackest you can > get in gray space. On the other side, RVB(0,0,0) is really the blackest thing > you can get in RVB space.
Yes! we just found the same through trial and error... > So your options are: > - set a black as RVB(0,0,0) so it will translate into "0.0 g" when you export > in gray PDF; > - set a black as CMYK(100,100,100,100) so it will translate into "0.0 g" when > you export in gray PDF; > - set a black as CMYK(0,0,0,100) --- the default one actually --- and export > as a CMYK PDF so it will be kept unchanged: > "0.00000 0.00000 0.00000 1.00000 k" > - or (but I?m a bit unsure even if my understanding and my testing agree!), > set a black as CMYK(0,0,0,100) _and_ activate black point compensation when > you export in gray PDF. We now *almost* understand what is going on ;-) thanks a lot. > And yes, it could be documented somewhere else than in IRC logs :-) I will try to document our mess-up next week. > PS: you can read PDF documents with PoDoFoBrowser (and PDF reference opened), > which is simply great! Brilliant. That is really a great tool best Femke
