Auto Cad Color Printing

Auto Cad Color Printing

jaredfmn
Community Visitor Community Visitor
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Auto Cad Color Printing

jaredfmn
Community Visitor
Community Visitor

Hello,

I have a brand new HP XL 3800 wide format printer.

 

We are seeing differences is when I choose a color in AutoCAD and it looks good in AutoCAD on my screen, but when it is printed, it appears darker.

 

Is there something I am missing here?

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pendean
Community Legend
Community Legend

"darker" means what to the rest of us that cannot see what you see please?

 

And what color is your AutoCAD background where it all "looks good"? White to match your paper would be a good place to start, maybe them the differences would be minimized?

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Logos_Atum
Advisor
Advisor

Edited:

 

Hello,

 

I once learned the trade of photo engraving which nowadays is a mostly digital domain. That trade is all about to enabling printers to get to match colors in print(s). To achieve that isn´t exactly easy. You probably got that wrong thanks to great looking advertisement. Here´s a bit of what you missed.

 

To actually get a print that looks exactly like what you see on screen requires a lot of time and a lot of expensive hardware and software as well as years of expertise. Given you had all the hard- and software necessary, you would be required to color match you monitor with a (pricy) calibration device that produces an icc profile first. The monitor must be able to cover the required color space, which usually requires a very expensive monitor. That´s a task you need very good sense of color on top of, for the manual adjustments necessary. I was tested for the extent of the spectrum I can see before I got the chance to learn the trade. Just think of the factors that directly influence what you see. Tired eyes are one of them. Also you´d need a perfect clone of your monitor to show this to the person that receives the image or print. The same steps on the same or different display hardware. People are used to cut down color spaces on low grade displays with varying age, temperature and varying built quality.

 

After that you would need to calibrate your printer with a series of reference color table printouts and a colorimeter or a very expensive scanner (our good one cost around 150.000 dollars back in 1999 and those with analoge computers writing film directly were even better) that measures the per- color channel color offset of the print to the reference data and adjusts the printer´s icc profiles values for each color until scanned or measured color values of the printout matches the file. In professional prints a printer adjusts the color flow, speed, pressure while printing and even if you´re among the best, color accurate prints are priced for a reason.

 

The profiles are then the base for a profile that incooperates the limits of the medium, including a paper simulation. But keep the following in mind: paper absorbs and dries differently depending on the humidity levels of the room and the paper as well as ventilation and temperature again for example. Also ink quality varies. Homogenizing is a great way to counter that, but it´s never perfect non the matter what the package says.

An all digital, easy to use and cheap workflow will never work without runtime adjustments that will require several prints per good print already and the mentioned above.

 

Something not even close is what you get using the expensive hard and software, again- non the matter wahat the package says. Something closer but surely still not that, you´ll get when a good printer watches and adjusts the process while printing. 

 

The main reason is the different blending methods used in digital and print. Let´s assume there isn´t a lot an RGB color space (Gamut) can´t display on screen. Most RGB colors can´t be printed in CMYK, which is a color description model used in printing a lot, as it is a subtractive blend process. It´s always a tradeoff. That´s one of the main reasons your print might be off. Brand colors that aren´t rasterized but actually mixed exist for that reason.

Why only assume RGB is better? In digital images the maximum amount of colors you see, is exactly your display´s resolution multiplied x by y. The maximum colors that can be saved in an image file, is limited to the number of pixels there are. For a HD screen that´s a bit more than 2 million pixels and therefore displayed colors, out of a palette with 32 bits. A single stroke on a painting or a bit of a negative film, features more colors than can be handled already . I doubt that files and realtime rendered content is paletted down to the number of displayed pixels, but that´s a different discussion.

 

Nontheless- start with a white background and use a pencil plotter, not an inkjet. And "brand new" does not exactly speak in the name of quality.

 

😄

 

 

Take care and stay positive. No one can expect a matching print like that. Actually I pretty much doubt there is one that does match.

Dogs aren´t flammable.
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