Keep transparency color appearance when rasterizing

[lfcorullon]

Hello, all.

I need to raster backgrounds and some of my files have pageItems that uses transparencies.

I need to keep the color appearance that element has, but rasterizing it. Am I clear?

Of course the items behind that transparent element must have their colors kept too.

[Monika Gause]

I really don't understand what you're doing there.

Please describe step by step:

what exactly are you rasterizing? How is it built?

which document color mode?

are there placed images included?

which version and system?

how is color management set up?

how exactly are you rasterizing it?

[lfcorullon]

I'm rasterizing vector (path) elements.

Every of them are filled with color.

Some of them could have transparency changed.

Some of them could be behind the ones that has transparencies, so it's

color is visually changed too.

Im using cmyk color mode.

No, there is not images placed.

I'm using Win10 and AI CC2019.

I need to rasterize those elements by javascript. But I'm making manual

tests first. To do it, I just select the items I want to raster and object

rasterize.

Am I doing something wrong?

>

[Anna Lander]

When rasterizing, choose Transparent for Background option

[lfcorullon]

Yes. But I need the bg to be flatten, as a jpg. No transparencies. But

keeping the colors...

[Ton Frederiks]

CC 2019 what are your document color settings?

If they are Emulate Adobe  Illustrator 6.0, you need to change it to something that is color managed.

[lfcorullon]

Are you meaning cmyk/rgb?

I'm using cmyk.

[Ton Frederiks]

No, I mean Edit > Color Settings, what are those settings?

[lfcorullon]

This are the setting I have.

On Sun, Oct 28, 2018 at 5:19 PM Ton Frederiks <forums_noreply@adobe.com>

[Ton Frederiks]

  wrote

This are the setting I have.

On Sun, Oct 28, 2018 at 5:19 PM Ton Frederiks <forums_noreply@adobe.com>

I cannot see your settings, please upload a screendump or describe your settings.

[lfcorullon]

Settings: North America General Purpose 2

RGB: sRGB IEC61966-2.1

CMYK: U.S. Web Coated (SWOP) v2

RGB: Preserve Embedded Profiles

CMYK: Preserve Numbers (Ignore Linked Profiles)

All checkboxes unchecked.

[Ton Frederiks]

That looks normal.

Does the document that changes color have the same profile?

You can check that at the bottom of your window:

Is it possible to share an example file that shows the problem?

Dropbox, WeTransfer or CC file sharing.

[lfcorullon]

Sure, Ton.

Dropbox - tests_examples_LFC.ai

My question is: I need to flatten/rasterize the background (in this example I removed the front elements).

When I use the rasterize option (even AI UI or javascript) the result is like the right artboard.

I need the color that is on the left artboard...

In the researches I made, I understood the white artboard isn't actually white (it refers to "no color"). So, when we add a white background manually, or rasterizing the artboard, the appearance changes, as we can see in the attached file.

Thank you so much for your attention.

[Ton Frederiks]

There is a Flattener setting "Preserve Alpha Transparency" that makes the difference.

Turned on, you get the result you see on the left artboard,

Turned off you get the darker result.

[lfcorullon]

But keeping it turned on, the transparency will be kept. I can't have

transparencies.

I think is a "problem" without solution. Maybe it'll be needed to remake

the colors using white bgs to have the right color (the AI appearance

color) in print.

Thank you so much for all your help!

On Tue, Oct 30, 2018 at 6:08 PM Ton Frederiks <forums_noreply@adobe.com>

[Ton Frederiks]

lf.corullon  wrote

But keeping it turned on, the transparency will be kept. I can't have

transparencies.

I think is a "problem" without solution. Maybe it'll be needed to remake

the colors using white bgs to have the right color (the AI appearance

color) in print.

I agree, the only solution I see is to add a white object as a background.

Maybe you can add that to your javascript, or use an action to do that.

[lfcorullon]

Yes. That's the easiest part.

The problem is to get the "right" color to change the CMYK applied on objects that have transparencies.

I'll keep thinking in a workaround. Thank you so much!!!

Kind regards from Brazil.

[Ton Frederiks]

I hope you can find a workaround.

Kind regards from the Netherlands.

[Ray Yorkshire]

Interesting problem anyway, which I don't understand but I would like to.

If you change the  Document Color Mode , to RGB

then the reduced transparency colors  behave the same against both the artboard white, and a rectangle of white; as they should.

What does that say?

that there's RGB colours gatecrashing a CMYK document?

So maybe

File > Document Color Mode >  RGB

Object rasterize (background white)

File > Document Color Mode > CMYK

or is there a flaw in this...

[lfcorullon]

Great! Great suggestion!

One of the colors is kept. The most back object, however, doesn't.

As you can see here:

The original file is still on my dropbox if you want to see it: Dropbox - tests_examples_LFC.ai

Thanks for trying help me.