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CTB - trying to get a few colors to print red

Crass
Collaborator

CTB - trying to get a few colors to print red

Crass
Collaborator
Collaborator

All of our standard CTB colors print in black or gray. I am trying to add a few red ones. For example color 220. For whatever reason it doesn't seem to be registering and is still printing black or technically Gray 67% according to this handy website.

 

Here is table view:

ACAD_ctb_1.jpg

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Here is the plot result:

ACAD_ctb_2.jpg

 

 

 

Thanks!

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AutoCAD 2018/2021
AutoCAD Civil 3D 2021
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Soluciones aceptadas (1)
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7 Respuestas
Respuestas (7)

RobDraw
Mentor
Mentor

Have you tried changing the "Convert to grayscale" setting?


Rob

Drafting is a breeze and Revit doesn't always work the way you think it should.
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JamesMaeding
Advisor
Advisor

@Crass 

I recommend another approach.

We run into this all the time where we have an engineering plan that plots using our company standard pen table, which is all black and white and greys when plotted.

We are asked to make a pdf with bubbled items in red.

The answer is to make those items or layers use truecolor (rgb) which always plots in that color no matter the pen table. If you do this, all of a sudden you can make anything any color without an extra pen table.

Now, the one downside is people must know that truecolor red is [whatever you tell them]. No lipstick pink when someone said red. If that is a major issue, then your "make one of the 256 as red" predefined in pen table is not bad.

I have avoided that though as after a while people start asking for standard green, yellow, orange.... and there are better, more flexible ways to handle that IMO. I create a drawing with say, standard existing and proposed utility layers they can use to bring in layers at correct colors.

good luck,


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I'm just here for the Shelties

Anonymous
No aplicable

I also have a ctb file I created to convert all standard colors to greyscale shades. I edited color 220 to "Red" and get the results I expected- see images attached. I am using (plain vanilla) AutoCAD 2020.1 on Win10 Pro v1903 build 18362.356.

Plotted using Adobe Acrobat pdf driver. Not a lot of contrast between the almost-magenta native color 220 and red, but enough to see that it works on my end.

What is your AutoCAD version/Windows version, and are both up-to-date?

Also a dumb question- when you plot and do not get the desired/expected result, are you certain you are using the newly edited version of the ctb file in question? No chance your acad file directory is pointing to an older, un-edited ctb file? Network copy instead of a local or vice-versa?

Are you plotting to pdf or a physical printer? In either case, is there an override in place in the driver settings (or on physical printer) to convert colors to greyscale or print Black&White?

That's about all the ideas I have- hope one works...

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JamesMaeding
Advisor
Advisor

I'm bored on a conference call, so added this as an example of a table we have that modifies index colors to plot as canned colors we want. I think in your pen table you need to set "Color" by rgb, not as "red":

pentable.jpg


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I'm just here for the Shelties

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Crass
Collaborator
Collaborator

 


@JamesMaeding wrote:

@Crass 

We are asked to make a pdf with bubbled items in red.

The answer is to make those items or layers use truecolor (rgb) which always plots in that color no matter the pen table.


Thanks for the feedback. That's what I have been doing too for years and it works great, but I have the opportunity to develop standards for a new company and thought I would simplify the process by burying three red lines of varying LWT in the standard ctb for redlines, etc.

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AutoCAD 2018/2021
AutoCAD Civil 3D 2021
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Crass
Collaborator
Collaborator

@JamesMaeding wrote:

I'm bored on a conference call, so added this as an example of a table we have that modifies index colors to plot as canned colors we want. I think in your pen table you need to set "Color" by rgb, not as "red":

pentable.jpg


Nothing like a conference call for catching up on your forum activity. :cara_con_una_leve_sonrisa: Thanks for the suggestion. This is exactly what I am trying to do, but somehow when I plug in the 255,0,0 in my ctb color it "snaps" back to red.

ACAD_ctb_3.jpg

How do you get your RGB values to stick?

 

Also I am ashamed to admit that I really don't understand screening at all.

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AutoCAD 2018/2021
AutoCAD Civil 3D 2021
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Crass
Collaborator
Collaborator
Solución aceptada

I just realized that I had the Convert to grayscale switched on which obviously you wouldn't want if you want the color to print in color. The fact that the label switches to "red" from 255,0,0 true color doesn't seem to matter.

 

CTB.jpg

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AutoCAD 2018/2021
AutoCAD Civil 3D 2021
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