Problems exporting into pdf

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e8s8x
Posts: 1
Joined: Fri Mar 28, 2014 10:28 am

Problems exporting into pdf

Postby e8s8x » Fri Mar 28, 2014 10:42 am

Hi there!

Anybody can give me a hand exporting a svg file into a pdf file, please? I'm new using Inkscape so that I don't know what I'm doing wrong.

The problem is the following... when I convert a file into its pdf extension, this file seems like it loses quality, even though I put 300 ppp of resolution.

Does anybody have the same problems or know what happens?

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ragstian
Posts: 1181
Joined: Thu Oct 11, 2012 2:44 am
Location: Stavanger-Norway

Re: Problems exporting into pdf

Postby ragstian » Fri Mar 28, 2014 11:11 am

Hi.

Before exporting make sure you set your page size correctly.
For A4 - 297 x 210 mm, for US letter 11 x 8.5 in.

Good Luck
RGDS
Ragnar
Good Luck!
( ͡° ͜ʖ ͡°)
RGDS
Ragnar

Lazur
Posts: 4717
Joined: Tue Jun 14, 2016 10:38 am

Re: Problems exporting into pdf

Postby Lazur » Fri Mar 28, 2014 9:41 pm

What kind of quality loss happens?

Usually quality loss is in connection with raster parts.
If it was 100% vector, there would be no loss of quality, nor any affect of a set rasterisation resolution.
Well here I assume you are using the save as pdf option instead of a third party software like cutepdf to print pdf from the document, which would make a raster copy of the vectors and alot more lossy itself.

So, there are two kinds of raster parts that can preserve quality loss.

The one is, raster images inside the svg.
Pdf uses a jpeg compression on raster images, which is lossy by default, but sadly in inkscape you cannot set the compression ratio.
There was a topic here asking about how to embed exactly the same jpeg in the pdf, to prevent loss from resaving with lower compression.
There is no answer for that yet.

The other is, when you use a filter that needs to be rasterised for the pdf.
Resolution settings in the save as panel refers to that.
For example, blurring is such a filter.
If you save as pdf, the blurred objects will be represented by raster images there, which is a certain quality loss.
You can set a higher resolution for the rasterisation for a better quality.

Other than these, pdf cannot handle a complex combination of clipping+masking, especially when there is a filter involved too.


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