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SinglishPS1
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Different Printers

Sep 19, 2012 3:10 PM

Tags: #printer #layers #dpi #screen_quality

I use Acrobat X Pro under Windows 7, and my document is created in Word 2010, then converted to PDF. (It's possible I used PDF995 to generate the pdf file because I only just upgraded from Acrobat 7 to X.)

 

My document uses 50% (gray) shading for some of the text and as a screen behind some of the text. On my HP laser printer, the 50% gray is smooth, but my service bureau sent me a proof, and the gray all looks grainy.

 

The service bureau said my images were at 150 dpi and the pdf document is layered. I am pretty sure I generated my document at 1200 dpi, and when I open the document in Acrobat X I can't see any layers. They also said I might get better results if I could make my images at 300 dpi.

 

Any thoughts on why the smooth gray on my laser printer is grainy from the service bureau, and how I can really get a higher resolution in my pdf file?

 

Thanks for any thoughts on this. I feel I have a lot to learn!

 
Replies
  • Currently Being Moderated
    Sep 19, 2012 6:37 PM   in reply to SinglishPS1

    Something doesn't make sense here. A gray shading background in Microsoft Office applications is normally a filled vector item which has absolutely no inherent resolution. The same is true for text with a gray colorant. It is rendered on screen or in print at whatever the device resolution is without any lossiness due to upsampling or downsampling.

     

    One possibility is that the 50% gray background that you are producing is not truly gray where in such RGB applications as all the Microsoft Office applications, gray is defined as all values of R=G=B exactly! R=G=B=0 is black and R=G=B=1 is white. Check your original Word document to make sure you have properly specified gray as R=G=B exactly. If not, fix and try again, making sure you create the PDF file using the save as Adobe PDF using Acrobat X Pro. Note that under Windows all text and vector content from Office for which R=G=B is automatically output as grayscale PDF when you create PDF with Acrobat X Pro using the save as Adobe PDF feature. If you were using something dicey like “PDF995” instead of Acrobat, it is possible that what is happening is that your grays are coming out as what we would call “rich gray” composed of C, M, Y, and K colorants, not pure K (i.e., black) and your so-called service bureau is not properly accommodating for this.

     

    Another thing to check is transparency. For your purpose, all these items, i.e. the text and backgrounds, should be fully opaque. (In other words, 50% gray is R=G=B=127 with transparency of 0%, not R=G=B=0 with transparency of 50%) If not, it is conceivable that somewhere along the line your vector fill backgrounds and/or gray-colored text is being converted to raster images at some resolution. The fact that your service bureau is talking to you about a particular image resolution would be indicative that transparency may have been unknowingly used by you for this coloring.

     

    I have no idea what your service bureau means by the PDF file is layered. That comment makes no sense!

     

    Check on the ideas above and let us know what you find. Or post the file (both Word and PDF) for us to examine.

     

              - Dov

     
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  • Currently Being Moderated
    Sep 19, 2012 7:27 PM   in reply to SinglishPS1

    I've e-mailed you with information as to how to send the files to me as e-mail attachments.

     

              - Dov

     
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  • Currently Being Moderated
    Sep 20, 2012 11:11 AM   in reply to SinglishPS1

    As a follow-up to anyone following this thread ...

     

    Joe sent me his PDF file. There was absolutely nothing wrong with it. All text, vector, and raster content was in DeviceGray color space. I had no problems viewing or printing any of the content on any of my devices.

     

    There must be some issue with his print service provider with whom he will now consult!

     

              - Dov

     
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  • Currently Being Moderated
    Nov 6, 2012 4:48 PM   in reply to SinglishPS1

    Two items:

     

    (1)     You shouldn't be printing to the Adobe PDF Printer to create PDF with Acrobat X Pro and Office 2010. You should be using the Save as Adobe PDF option that Acrobat installs into Office 2010. With this option, there is no stink'in PostScript intermediate. PDF is directly generated from the Word document. In terms of the joboptions file to use, I would recommend the High Quality Print settings for best results for PDF that might need to be printed!

     

    (2)     Hopefully you don't think that I am part of Adobe Customer Support. I'm just a dumb engineer here!

     

              - Dov

     
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  • Currently Being Moderated
    Nov 6, 2012 5:26 PM   in reply to SinglishPS1

    Absolutely don't use the plain Save as PDF. That's Microsoft's PDF generator which is fairly crufty and can cause major problems with transparency, fonts, and color.

     

    In Office 2010 applications (let's deal with Word 2010 here), Acrobat installs its own tab for PDF. You want to use the Create PDF button from this tab:

     

    11-6-2012 5-12-43 PM.png

     

    (Click on the images to get an enlarged version to view on this forum!)

     

    You can set the joboptions via the Preferences button prior to pressing Create PDF. (The results are “sticky” and persist between invocations!)

     

    This is where you specify High Quality Print:

     

    11-6-2012 5-14-10 PM.png

     

    You can also access the Adobe PDF creation function from the File tab selecting Save as Adobe PDF:

     

    11-6-2012 5-15-05 PM.png

     

    Again, don't use the Microsoft PDF option (has more bugs than an entomology lab and more errors than an early Mets game!).

     

              - Dov

     
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  • Currently Being Moderated
    Nov 7, 2012 1:29 PM   in reply to SinglishPS1

    Why in the world would you want your Hebrew book in PDF format in reverse order?

     

    You still read or print page 1 first followed by page 2, etc.

     

    Is it a matter of printing the resultant PDF file or imposing the resultant output in some way?

     

    I produce and print Hebrew content on a regular basis and have never had the need to use any special procedures!?!?

     

              - Dov

     
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