Change Pdf To Grayscale Acrobat Dc

[Lihuel Harding]

Iam trying to meet the requirements of my book publisher who wants a PDF document in which all imbedded photos appear in grayscale color mode and in JPEG format. When I convert my MS Word document to PDF using Acrobat 8 Professional, its formerly grayscale, JPEG imbedded photos show in "Preflight" to be "Black." (I assume Word arbitrarily makes this change when I insert the grayscale photos into my document.) I would like to use Acrobat's Preflight "fixup" to "Convert to grayscale" all my photos in the document. My question is: In addition to converting the photos to grayscale, does this change adversely affect the text (fonts) by making its lines lighter or less black, or will the change leave the text looking just as it looked before this conversion?

Thanks for answering my stupid question.

Edwin Scroggins

[link=mailto:edwin [dot] and [dot] alma [at] att [dot] net]edwin [dot] and [dot] alma [at] att [dot] net[/link]

I am also having trouble with converting AutoCAD DWG to Adobe PDF. I have tried several different methods. I've tried outputing the color PDF to a post script file, however that is still in color. I've tried using custom Color Plot Styles (monochrome.ctb) and Named Plot Styles (monochrome.stb), but since I did not create the original AutoCAD DWG (it is 10 years old from 2004), they are not the correct plot style files. I do not have AutoCAD and use ProE/Creo instead. I've tried importing into my CAD tool, however all the fonts are different. I've also tried exporting the PDF to a raster format like TIFF but the resolution is really bad for engineering drawings. If I increase the resolution, then it sometimes will say that the image is too big and in cannot save/export the image.

It seems like this should be really simple to do in Adobe. I have Adobe Acrobat Pro 10. I can go to Tools > Print Production > Preflight > PDF Fixups > Convert to grayscale, which will convert to grayscale, but not to monochrome. Similarly I can go to Tools > Print Production > Convert Colors and select Conversion Profile to Gray Gamma 2.2, however that still will produce grayscale, but not monochrome.

Select all click the attached colour box and change all to white. Then save as so don t lose original one..Convert it.. Issue is when you wanna do convert Pdf to Cad.. I couldn t find any safety way to do that. And I gave my Pdf to Autocad conversion job to company..

- - I hope this helps - -

(Complain to someone else if it doesn't) RE: Grayscale as K only duncdude (Programmer)16 Oct 05 14:03Photoshop will still display the CMYK values (which would only become relevant if the image was promoted to colour - even when in greyscale mode. it also displays a K only value (to the left)

Kind Regards

Duncan RE: Grayscale as K only texasjoe (TechnicalUser)(OP)16 Oct 05 15:44Well, maybe it's not a photoshop problem then. The problem is this: When grayscale photos in process color pages are sent from Acrobat to the imagesetter, we get images on all four plates: CMY&K. In the end they look gray, but they are actually a combination of all four colors. If we had grayscale images on the K plate only, with no image on the other three plates then registration would not have to be perfect to get a perfect image.

Maybe this isn't a photoshop issue, maybe it's an InDesign or Acrobat issue? RE: Grayscale as K only duncdude (Programmer)16 Oct 05 15:56sounds like a Distiller thing to me

Kind Regards

Duncan RE: Grayscale as K only texasjoe (TechnicalUser)(OP)16 Oct 05 16:03We don't use Distiller -- we print to Adobe PDF using Acrobat Professional. RE: Grayscale as K only duncdude (Programmer)16 Oct 05 16:13I think that still has job options

Kind Regards

Duncan RE: Grayscale as K only texasjoe (TechnicalUser)(OP)16 Oct 05 16:48Oh yes, lots and lots of options and settings.

I'll post this at the Acrobat forum -- maybe they'll have some suggestions.

Thanks!

Joe RE: Grayscale as K only duncdude (Programmer)16 Oct 05 16:56Good luck

Kind Regards

Duncan RE: Grayscale as K only singlewahm (TechnicalUser)17 Oct 05 11:47You can fix this in Photoshop. There is a particular color setting you can use where it will convert your black and white images properly, but if you accidently use it on color images they will look like ick. :) I don't have the settings handy right now, but it has something to do with using GCR instead of UCR. I can send specifics later if interested.

The other thing I do is to set the image to CMYK mode. Then you select the entire canvas and copy. Now go to each of the color channels and delete. Select the black channel and paste. Then change your image to Grayscale mode.

Hope that helps,

Shannon RE: Grayscale as K only duncdude (Programmer)17 Oct 05 14:13what !!!???

what does this have to do with Grey Component Replacement or Under Colour Removal ???

as far as i am aware these describe how the black is utilised in a 4-colour image - i don't think it is intended for this at all

please tell me if i am missing the point !

Kind Regards

Duncan RE: Grayscale as K only Treedodger (TechnicalUser)18 Oct 05 10:00This is my first post in an attempt to help anyone, so please forgive me if I ask for something to be done that can't be.

Would it be possible to have the image(s) uploaded or link us to them? Maybe we can help if we saw what you started with and how you converted to grayscale.

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Im wondering about the Dot Gain 15% or 20% etc... What does this do really? And also in the older post there were some people saying that the method made the images to a lower quality, like compressing them harder - is this fixed now in this one?

A fast way to convert and this only applies to text, such as blue hyperlinks, is to select print choose PDF, lower left side of print dialog box select print to black. This is a windows feature, it will change the text to 100% black instead of 84% grayscale. Do not do this with anything other than text.

@Anonymous: Make sure the drop-down list in the upper left says "Show all". If not, change it and the options should appear. Or, if that isn't the problem, try clicking on the Options button in the upper right, and chose "Import Preflight Profile" and try to locate the preflight profiles on your hard drive. All the profiles displayed in the screen shot are included in Acrobat, and should be installed.

I do not have a Convert Device Gray option in the Advanced Print Production /Convert window. Presently getting a built black for all Device Gray within documents. Looking to convert Device Gray to grayscale. Can anyone help?

Hi, wondering if someone can help me. I have a PDF with tables with alternating shaded rows, RGB 250,255,235 and RGB 238,255,189, light green. They are contrasty when printed in colour but in B&W almost white. Using the convert colour to greyscale fixup is far too light and no contrast. Using the Convert to spot colour fixup I can convert both of them one after the other, but I can't put two spot colour fixups in the same preflight profile, so have to run two separate profiles.

Is there a more efficient way for me to convert these two RGB colours using another type of fixup, or another too;l? Thankyou, and sincere thanks for the original tip, which got me started on solving this problem.

I did all the steps in Pro X, but somehow 1) it doesn't convert my PDF in greyscale, and 2) Acrobat freezes and bugs afterwards. I don't get what's going on, I've been searching for one week almost 2 work days non stop :(

This works well, but the default dot gain setting of 15% (according to Steve Werner at -export-pdf-to-grayscale-in-indesign-cs6.php) is too dark for my photos. Any way to edit profile to 30% in the Preflight settings? Thanks!

Hi, I upgraded to Adobe Pro DC and tried using this method, but it doesn't work if there are gradients. All other pictures converted to gray except for the background which has a radial gradient effect.

The Adobe PDF Settings page shows the conversion settings that you can specify for your sources to use. You can use any of the predefined PDF settings or create your own. The PDF settings determine precisely how files are converted and their resultant PDF structure and features. Adobe PDF settings were previously known as Distiller parameters or job options.

PDF Generator provides several predefined PDF settings for your use. You cannot modify these predefined settings; however, you can create a setting based on an existing one by editing the setting and saving it under a new name.

Oversized Pages: Creates PDF documents that are suitable for reliable viewing and printing of engineering drawings that are larger than 200 x 200 inches. Created PDF documents can be opened in Adobe Acrobat Professional and Acrobat Standard, version 7 or later, and Adobe Reader 7 or later.

PDF/A-1B 2005 CMYK / PDF/A-1B 2005 RGB: Checks incoming jobs for compliance to the ISO standard for long-term preservation (archival) of electronic documents and creates PDF/A files only if compliant. These files are primarily used for archiving. Compliant files can contain only text, raster images, and vector objects; they cannot contain encryption and scripts. In addition, all fonts must be embedded so that the documents can be opened and viewed as created. PDF/A-1b uses PDF 1.4 and converts all colors to either CMYK or RGB, depending on which standard you choose. PDF files that are created with this settings file can be opened in Acrobat 5 and Acrobat Reader 5 and later. For more information about PDF/A, see Adobe and industry standards.

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