Guides to darker, clearer PDFs
Why documents print faint, what can be recovered from a faded scan, and how to get a clean result from the printer you already have.
Darkening PDFs
Why text looks faded or grey, and how to bring it back.
How to Darken a PDF in Adobe Acrobat
What Adobe Reader, Acrobat Pro and other desktop PDF programs can and cannot do to darken a PDF for printing, plus a free way that needs no download.
7 min read
How to Darken a Downloaded Article PDF
Saved a news article, report or web page as a PDF and the text is pale or the print is hard to read? Why it happens and how to make it darker for screen and paper.
6 min read
Why Does My PDF Look Faded?
Four different things make a PDF look faded or light, and each needs a different fix. How to tell them apart in two minutes, and how to fix a light PDF.
6 min read
Why Is My PDF Text Gray?
PDF text can look grey on screen or print grey for three unrelated reasons: the colour value, thin strokes, or the printer. How to tell which, and what to change.
6 min read
How to Darken a PDF: Six Methods
Six ways to darken a PDF, from fixing the source to re-scanning to a browser tool, with what each one costs you and when to use it.
7 min read
How to Make PDF Text Darker
Making text darker means different things in a digital PDF and a scanned one. Here is what changes in each, and how to keep text sharp and selectable.
6 min read
How to Fix a Faded PDF
Thermal receipts, carbon copies and third-generation photocopies. What can be recovered from a faded document, what cannot, and how to do it safely.
6 min read
How to Darken a Scanned PDF
Scanned pages are images, not text. Here is what that changes, how to darken them properly, and when a rescan will beat any amount of processing.
7 min read
Contrast and readability
What makes a document hard to read, and what you can change.
How to Make PDF Text Easier to Read
What actually makes a PDF hard to read, from contrast ratio to stroke thickness to paper versus screen, and what you can change when you cannot edit the original.
7 min read
How to Increase PDF Contrast
Brightness, contrast, black point, white point and gamma explained with documents in mind — and how to pick the right one for a faint PDF.
7 min read
How to Make a Scanned Document More Readable
Readability is more than contrast: resolution, sharpening, colour handling, OCR and accessibility all decide whether a scan is genuinely usable.
8 min read
Brightness and backgrounds
Dull pages, grey paper, and why brightness is not contrast.
How to View a PDF in Dark Mode
Turn a PDF into dark mode on Windows, Mac, iPhone and Android with the built-in colour settings, and why a dark-background PDF is the wrong file to print.
6 min read
PDF Brightness vs Contrast
Brightness and contrast are not interchangeable. Measured results on a real faded scan show which one rescues a faint PDF and which one makes it worse.
7 min read
How to Brighten a PDF and Whiten a Scan
Brightening a PDF is three different jobs: a page that is too dark, paper that is grey, and uneven lighting. Which control fixes which, and the trap to avoid.
6 min read
Scanned documents
Cleaning, sharpening and searching scans.
How to Sharpen a Blurry PDF
What sharpening can and cannot do for a blurry PDF: how an unsharp mask works, how to avoid halos, how to tell soft from low resolution, and when to rescan.
7 min read
Remove Shadows and Grey Background from a Scan
A grey background, a shadow and speckle are different problems with different fixes. How to tell them apart, what order to fix them in, and how to capture better.
7 min read
How to Make a Scanned PDF Searchable
How OCR makes a scanned PDF searchable, what decides its accuracy, why cleaning the scan first helps, and how to do it without uploading your document.
7 min read
How to Improve Scanned PDF Quality
Most scan quality is decided at capture time. Resolution, colour mode, lighting and compression settings that make every later step easier.
7 min read
How to Clean Up a Scanned PDF
Remove grey backgrounds, speckle, shadows and show-through from scanned PDFs — and keep the faint content you actually wanted.
6 min read
Printing
Why a PDF prints light, and how to get a clean page.
How to Print a PDF Darker from Your Phone
Print from an Android phone or iPhone and the page comes out pale? Darken the PDF in your browser, then change the settings that decide how dark it prints.
6 min read
How to Stop PDF Colours Fading in Print
Why colours look duller on paper than on screen, what to check when exporting a PDF for print, and how to keep faint colours visible in a printout.
7 min read
Inkjet Printing Too Light? What to Check
An inkjet that prints faint can have a clogged head, a wrong paper setting, economy mode, low ink, or a faint file. A step-by-step way to find which it is.
7 min read
How to Prepare a PDF for Printing
A practical checklist for getting a clean print: page size and scaling, margins, text darkness, background, colour or greyscale, image resolution, and a test page.
7 min read
How to Make a PDF Print Clearly
The whole print chain: file tone, page scaling, driver settings, paper and fonts — and which of them actually decides how clear the result is.
7 min read
How to Make a PDF Darker for Printing
A step-by-step walkthrough: darken a PDF, check the result on one page, and set your printer up so the improvement survives the trip to paper.
6 min read
Why Does My PDF Print Too Light?
The document looks fine on screen and prints faint. Here is what is actually happening, and how to tell whether the file or the printer is at fault.
7 min read