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Enlarge the small print before you fax it, because fax machines send at limited resolution and fine text blurs fast. Print or reformat the document at a larger size, raise the contrast, and send a test page to yourself or a colleague first. If the recipient still cannot read it, mail the original instead of faxing a third blurry copy.
A fax is a black-and-white picture of a page, sent over a phone line at a fixed resolution. Standard fax resolution is coarse, roughly comparable to a low-quality photocopy, and even the "fine" mode on most machines only doubles it. Text that looks crisp on screen at a small size is made of thin strokes and tight spacing, and those are exactly what a coarse scan loses first. Serifs crumble, the dots on i's and j's vanish, and numbers like 3, 5, and 8 start to look alike. Colour is lost entirely, so any meaning carried by coloured text, highlighting, or red ink disappears.
Phone line quality makes it worse. A noisy line forces the two machines to resend parts of the page or to drop to a slower, coarser mode, and each retry softens the result a little more. A page that was already borderline can come out unreadable at the far end even though it looked fine on your machine. This is why the same document sometimes faxes cleanly one day and blurs the next: the line, not the document, changed.
| Problem | What causes it | Fix |
|---|---|---|
| Tiny text blurs together | Coarse fax resolution | Enlarge to at least double size before sending |
| Grey text vanishes | Black-and-white conversion drops light tones | Darken the text, print in pure black |
| Coloured highlights disappear | No colour in a fax image | Replace highlights with bold text or underlining |
| Handwriting is unreadable | Thin pencil strokes fall below resolution | Rewrite in dark pen, or type the key figures |
| Page comes out streaked | Dirty scanner glass or a bad line | Clean the glass, resend, and check the confirmation |
The simplest method is photocopy enlargement: copy the page at a larger setting so the small print spreads across two pages instead of one, then fax the enlarged pages. If you have the document as a file, reformat it instead: raise the font size, widen the line spacing, and reprint. A contract printed at a readable size across extra pages is far more useful than the same contract squeezed onto one page that nobody can read at the far end. Page count matters less than legibility, and a recipient would rather receive six readable pages than three blurred ones.
For footnotes, terms and conditions, and prescription labels, consider transcribing just the critical lines. A cover note that types out the dosage, the account number, or the deadline in large print gives the recipient the key facts even if the fine print behind it stays fuzzy. Do not retype legal text and present it as the original, though: label a transcription clearly as a transcription, and send the original pages behind it.
Contrast is the second lever after size. Print the document in pure black on clean white paper, and avoid grey photocopies of photocopies, which lose contrast at every generation. If the original is a faint carbon copy, a pencil form, or a thermal receipt, make a fresh dark copy first: trace over pencil in dark pen, or photocopy the receipt onto white paper with the darkness setting raised. Yellowed paper, coloured paper, and glossy paper all scan poorly; a plain white reprint beats a faithful copy on the original stock.
Also check the machine's settings before sending. Most fax machines offer a resolution setting, often labelled standard and fine, and some offer a contrast or darkness control. Choose fine resolution and a darker setting for small print, and accept the longer transmission time. On an online fax service, the equivalent choice is the scan quality of the file you upload: scan at a high resolution and in black-and-white mode, not as a compressed colour photo from a phone camera.
Yes, whenever the document matters. Send one enlarged page to the recipient first, or to your own number or a colleague's machine, and ask whether the smallest text reads cleanly. A test page costs one page of transmission and can save a rejected filing, a misread prescription, or a missed deadline. If the test comes back blurry, enlarge further or switch methods rather than sending the full document and hoping.
When faxing cannot produce a readable result, mail the original. A physical letter preserves every detail of the small print exactly, and a tracked or registered letter gives you proof it arrived. LetterAgent mails letters to US and Canadian recipients on a standard letter size page, printed exactly as quoted, and you approve the exact price before anything is sent. For faxing itself, LetterAgent fax is currently available in testing for US and Canadian numbers, with no inbound faxes, and delivery is never promised for a specific time.
Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.
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