Curve segments plot thinner than line segments

[mermerCAD]

Hi Everybody-

Curve segments are plotting thinner than line segments.

It is happening across multiple drawings, multiple projects, multiple users, and multiple offices.

I tried all of the different PDF .pc3 files and got the same results.

I tried every configuration with the Hardware Acceleration/Graphics Configuration.

I opened the pdf in Adobe rather than Bluebeam, and it looked the same.

I tried adjusting some properties in the .ctb file, but that didn’t change anything.

I opened the pdf in Chrome.  It was a little better, but I think that is because it doesn’t zoom in as close.

I researched online and found a couple of posts about it, but no solution was ever found. 

https://forums.autodesk.com/t5/autocad-forum/arcs-and-curved-polylines-plotting-thin-when-using-auto...

https://forums.autodesk.com/t5/civil-3d-forum/curves-with-radius-under-xx-plotting-lighter-than-line...

I thought maybe it was because of an update, but I checked pdfs as far back as 10/2024, and they all have the same issue.

I have tried plotting without plot styles and assigning the lineweight to the layer.  Same results.

Any suggestions?  I have attached the etransmitted file if anyone wants to take a look.

Thanks so much!

Meredith

[paullimapa]

could you also answer the following:

1. AutoCAD version number: Enter ABOUT command, do a screenshot & share that here

2. Screenshot of the PLOT window

3. Attach PDF you generated with this issue

[illusionistNUGXG]

Hmmm,

is this problem still there, if you zoom in close in the PDF?

If yes, then it is just an inaccuracy of the PDF-viewer.

[mermerCAD]

Here is the About screenshot and the PLOT screenshot.  The pdf is attached.  Thanks for your help!

[mermerCAD]

Thanks!  But it seems weird that it is happening in multiple PDF viewers.  Both Bluebeam and Acrobat.

[paullimapa]

This is what I see zoomed in really close plotting using your plot settings:

Now the inner line/arcs are supposed to plot thinner using color 6 Magenta (0.009") compared to the outer lines using color 3 Green (0.010")

Using Acrobat as the viewer I could not really tell zoomed in that close that the curves are actually in different thickness compared to the lines.

Now there is a jog that occurs transitioning.

So I changed a couple of things just so I can see clearly:

color 6 Magenta (0.005") compared to the outer lines using color 3 Green (0.007")

Then I bumped up the resolution of the pdf device:

3600

4800

Now the jog at the connections are practically gone