Convert PDF to 100% black and white (NOT grayscale)?

New Here ,
Mar 11, 2021 Mar 11, 2021

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Does Acrobat Pro have a way to convert PDFs to true black and white? When I look in the "convert colors" function in print production it has grayscale, but I don't see black and white as an option. I've been searching for fixes and every tutorial and question/answer I find only converts to grayscale; does Acrobat not have the capability to convert to ture black and white?

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Edit and convert PDFs

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Adobe Community Professional ,
Mar 11, 2021 Mar 11, 2021

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Hi Sandrah,

 

Just out of curiosity, what is your goal, what are you hoping to achieve?

 

FWIW, B&W and grayscale are almost synonymous. I say "almost" becuase absolute B&W means that all antialiasing is converted to black as well. This is text at 200% the top one has antialiasing the bottom one is converted to absolute B&W. Are you sure you want that?

2021-03-11_12-13-44.png

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New Here ,
Mar 11, 2021 Mar 11, 2021

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I am aware that black and white means no shades in between, that's why I specified that I did not want grayscale. I want the only colors in the document to be 100% white and 100% black, aliasing is fine.

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Adobe Community Professional ,
Mar 11, 2021 Mar 11, 2021

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Two thoughts: can you get what you want from the original application that made the document?

 

If not, do you have access to Photoshop?

 

Also, what do you plan on doing with shades that will end up 50% gray? Average them up or down?

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New Here ,
Mar 11, 2021 Mar 11, 2021

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It sounds like what you're telling me is that it is not possible to convert to black and white inside if Acrobat Pro, is that correct?

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Enthusiast ,
Mar 11, 2021 Mar 11, 2021

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Hi,

take a look at the post below to see if it provides a solution for you....

https://pdf.iskysoft.com/convert-pdf/convert-pdf-to-black-and-white.html

 

Regards,

Mike

 

 

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Adobe Community Professional ,
Mar 11, 2021 Mar 11, 2021

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@sandrah80731053,

That's what @gary_sc is saying. Transforming a document from colour to greyscale is simply applying a transfer function to each colour information in the document. To transform a document from greyscale to pure black and white involves a lot more decisions to be taken. None of those decisions is limited to a simple mathematical transfer function but involves so much more and especially arbitrarily decisions like where is the threshold between converting the grey shade to black or to white. 

 

Those decisions are best taken at the "final" output device like the printer, as the printer engine has information about the physical limitations. 

 

So for offering a solution, it would really be helpful to answer the questions that Gary did ask as they will influence the solution one can propose. 

Regards, Abambo
Hard- and Software Engineer and Photographer.

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