Export PDF in CMYK Colorspace using Aspose.PDF

Aspose.PDF Product Family
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Received : 2007/10/10 03:40:54
Message : I need to make a pdf in cmyk, with cmyk images text etc. I tried the evaluation version of Aspose.pdf, but the resulting pdf is mixed rgb and cmyk. Is that because the evaluation text in the pdf is in rgb?

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Hi,

Please provide your code (or project). Our support developer will generate a PDF without watermark and let you check it.

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            Pdf pdf = new Pdf();<br>                pdf.PageSetup = new PageSetup();<br>                pdf.PageSetup.PageHeight = 50;<br>                pdf.PageSetup.PageWidth = 100;<br><br>                Section sec = new Section();<br>                pdf.Sections.Add(sec);<br>                <br>                <br>                Image back = new Image(sec);<br>                sec.Paragraphs.Add(back);<br><br>                back.ImageInfo.ImageFileType = ImageFileType.Jpeg; <br>                back.ImageInfo.File = "test.jpg";<br>                back.RotatingAngle = 45;<br>                <br>                pdf.Save("tester.pdf");<br><br>-----------------------<br>test.jpg have to be a cmyk image(attached)<br><br>
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Hi,

Thank you for considering Aspose.

Please find attached Pdf file for you reference.

Thanks.

5

It seems like the image is converted to RGB in the pdf. Is that the case?

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Hi,

I am not sure about this but I think it is in CMYK colorspace. I have checked it by using the Adobe Reader Tools->PrintProduction->Convert Colors.. option. Can you please tell me how did you identify that it is RGB colorspace or CMYK Jpeg?

Thanks.

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I think we have not chenged the colorspace when adding JPEG image into Pdf.

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It is I converted the image to cmyk in photoshop. I really need to know that it is possible to keep it in cmyk with aspose, because I am generating pdfs for print.

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Just as Adeel mentioned, we don’t know how to check if the image is CMYK in PDF. I think we have not changed the color space when adding JPEG into PDF. Can you please tell us how you check it?

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The case is that I’m not sure how to check it myself. Tried using Illustrator. I think the pdf you provided is cmyk, but I was hoping that you had some knowledge about this. The company that is printing this needed cmyk.

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I think this can be checked by Preflight in Adobe Acrobat. I checked it and found the image is cmyk.

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@JayOkay

We would like to share with you that you can convert images in PDF to CMYK color by converting PDF documents to PDF/X_1a format. Please use following Document.Convert() method:

Export PDF in CMYK Colorspace

pdfDocument.Convert(dataDir+"CMYK_SVG.log", PdfFormat.PDF_X_1A, ConvertErrorAction.Delete);