I thought no way, impossible. You caught me on a good day.
My screen shots are from AA9 Pro, yours may vary.
Preflight Panel > Fixups (the wrench) Options > Create New Preflight Fixup
Search for Convert to Spot, my result is shown.
Enter the values I have highlighted.
Name it, set it as a Favorite. Run it when needed, I do not know about batch converting, but your smart enough to figure that out I'll bet.
Very nice. I have seen this question before and hadn't figured out how to do it.
Those three icons top middle of the Preflight box are Profiles, Single Checks, & Fixups. You are currently toggled to the first, Profiles.
Click the Fixups, the wrench.
Next, top right Options flydown offers > Create New Preflight Fixup
From the resulting dialog there is a Find bar in which I entered Convert to Spot. This find field gets you close to an existing fixup which I modified per my Capture.
Keep me informed,
Oh ! Thank you again ! Finally, got it !
Actually, I had to try on a little bit of things before succeeding. Well you know, I had created the fixup, but couldn't find it back, etc. Anyway, finally got it !
I had to modify it a little bit, by adding a second set of values for RGB, it wouldn't work with only CMYK, don't know why.. By deduction, I tried values, and it worked. I couldn't have only "convert to spot color" in the list, there was still others fixups.. Well, the point is I couldn't find just a single "convert to spot", seems like I had none?! Here's the printscreen ..
So the result is good considering that some lines are thinner than others, they seem to be in gray at first, but when looking further (or zooming in) I can see they're really in black, they just print thinner as the pdf made from autocad had specific lineweights (property from autocad).
Thank you very much again!!!
I live in a cmyk dominant print environment, good work on the RGB source colors.
You may find a need to up your tolerance for rgb to 254 (?); I think you could have a colors ignored.
There is 255 units allowed in rgb, your starting source of 1 plus the threshold of 99 will ignore colors with all three channles above 101.
CAD programs have a nasty abilty to define lines which are worth a whole new topic.