What output device are you printed to?
Many upper end output RIPs have color channels that process color in
different ways.
For example, solid colors are rendered through a different channel than
Images.
It may be that your channels are setup to render what is essentially the
same color in different ways.
Most of these RIPs have options to turn off this color channel
rendering, I would look for settings like that.
-Bill Ensley
www.bearprinting.com
On 8/5/2011 3:14 AM, Wim Lambrechts wrote:
Hello,
I create a PDF page with background CMYK = 0,0,0,255 (full black).
Next I create a CMYK image (same CMYK values) and put it onto the page.
When I open the PDF on screen, this is OK, but when printed, it seems
the image is "deeper" black than the background.
PS: this issue is related to my previous one.
Creating the background:
PdfContentByte under = writer.DirectContentUnder;
under.SaveState();
under.SetCMYKColorFill(0,0,0,255);//CMYK value for black
under.Rectangle(0, 0,PageSize.A4.Width,PageSize.A4.Height);
under.Fill();
Creating the image:
byte[] gradient =new byte[255 * 4];
for (int lcv = 0; lcv< 256; lcv++)
{
gradient[lcv * 4 + 0] = 0;
gradient[lcv * 4 + 1] = 0;
gradient[lcv * 4 + 2] = 0;
gradient[lcv * 4 + 3] = 255;// (byte)lcv;
}
Image result =Image.GetInstance(256, 1, 4, 8, gradient);
result.ScaleAbsolute(256, 50);
Thanks !
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The must-attend event for mobile developers. Connect with experts.
Get tools for creating Super Apps. See the latest technologies.
Sessions, hands-on labs, demos & much more. Register early & save!
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_______________________________________________
iText-questions mailing list
iText-questions@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/itext-questions
iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
