After all this time I had a suspicion ... just now! (I just added another 3d with the same subject, more or less, but still do not see it - I do not know where it is ...).
The solution perhaps is this: In Printers, select the printer (for example PDFCreator), right mouse button, the printer properties, advanced, print processor (botton below), select TEXT (not RAW, that an image format).
The press now is finally as it should be ...
The fact remains that Firefox had already thought of his own and has not been necessary to do anything, and instead everyone else has left selected by default RAW.
I hope this betrayed "discovery" is helpful to everyone.