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Author Topic: Error message at creating PDF: object has transparency background  (Read 7478 times)

founder

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How to make a polygon grey instead of black?

I used the transparency to solve this problem. 20% transparency and black turns into light grey.

Just wanted to convert the current progress of my book into a PDF

There I got an error message for all the polygons where I used transparency to controll the color

a.l.e

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Re: Error message at creating PDF: object has transparency background
« Reply #1 on: December 04, 2011, 01:23:23 pm »
create a new color (edit > colors) as a gray...

ciao
a.l.e

Meho R.

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Re: Error message at creating PDF: object has transparency background
« Reply #2 on: December 04, 2011, 01:44:57 pm »
A tip, if you allow me: when you go to Edit > Colors, and click on New button, notice a dropdown list in upper right corner which contains a lot of color sets. Using, e.g., "Scribus X11 Grey" might be helpful as starting point for creating your desired grey (even if creating grey shouldn't be hard: set C, M and Y values to zero, and change value of K only; but for creating other colors this feature might be of great help).

Note: I assume you're using Scribus 1.4.0. I'm not sure about 1.3.3.x series.

founder

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Re: Error message at creating PDF: object has transparency background
« Reply #3 on: December 04, 2011, 01:47:16 pm »
create a new color (edit > colors) as a gray...

ciao
a.l.e

But the transparency made it already easy.

For example sunny day:

yellow sun
blue sky - transparency 20%

Cloudy day

grey sky - black with transparency 25%
behind the yellow sun

BTW, for what is transparaency, when the usage of transparency is seen as an error?


Meho R.

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Re: Error message at creating PDF: object has transparency background
« Reply #4 on: December 04, 2011, 02:03:32 pm »
...
BTW, for what is transparaency, when the usage of transparency is seen as an error?
Since I'm already here, I hope a.l.e wouldn't mind if I jump in :)

It's more of a warning, actually, depending on format and purpose of your document. Short version: if you intend to create material for print and/or have to use PDF/X-3, you'll get this warning so that you're aware that PDF/X-3 does not support transparency and your document will probably not look as expected (in other words: expect problems). But, if you use, e.g., PDF 1.5 and/or create material for online reading, this warning will disappear, since PDF 1.5 does support transparency. However, keep in mind that PDF 1.5 probably isn't what your printer would like to see.

Note: "Background" in "object has transparency background" is actually name of the layer.

founder

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Re: Error message at creating PDF: object has transparency background
« Reply #5 on: December 04, 2011, 02:05:08 pm »
I just found out the "Prelight verifier"

There are 5 different modes

PDF 1.3
PDF 1.4
PDF 1.5
PDF x/3
Postscript

My document with some use of transparency verifies without error as PDF 1.4 and PDF 1.4
All other modes give the transparency error

founder

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Re: Error message at creating PDF: object has transparency background
« Reply #6 on: December 04, 2011, 02:10:18 pm »
...
BTW, for what is transparaency, when the usage of transparency is seen as an error?
Since I'm already here, I hope a.l.e wouldn't mind if I jump in :)

It's more of a warning, actually, depending on format and purpose of your document. Short version: if you intend to create material for print and/or have to use PDF/X-3, you'll get this warning so that you're aware that PDF/X-3 does not support transparency and your document will probably not look as expected (in other words: expect problems). But, if you use, e.g., PDF 1.5 and/or create material for online reading, this warning will disappear, since PDF 1.5 does support transparency. However, keep in mind that PDF 1.5 probably isn't what your printer would like to see.

Note: "Background" in "object has transparency background" is actually name of the layer.

Thanks! Just studied Wikipedia article about PDF X/3 and I understand now the problem

a.l.e

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Re: Error message at creating PDF: object has transparency background
« Reply #7 on: December 05, 2011, 02:19:28 pm »
Quote
create a new color (edit > colors) as a gray...

But the transparency made it already easy.

no the transparency is not the best way to do it...
if you don't want to create a color for it, you'd rather use the "shade". it's in the color pane of the PP (upper right corner)

most of the time, i would still create a color for it. this way, if you use the color multiple times, you can change it in one step for the whole document...

ciao
a.l.e
« Last Edit: December 05, 2011, 08:40:49 pm by a.l.e »